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1. A compound for an organic electroluminescent device, selected from the group consisting of Chemical Formula 1, 2, 3, 4, 5, 6, 7, and 8, represented by Chemical Formula below: wherein Y1 represents an oxygen atom, a sulfur atom or a selenium atom, Ar1 and Ar2 are identical or different substituents and each represent a substituted or unsubstituted aryl group having 6 to 50 ring carbons, or a substituted or unsubstituted heteroaryl group having 5 to 50 ring atoms, Ar3 represents a substituted or unsubstituted aryl group having 6 to 50 ring carbons, or a substituted or unsubstituted heteroaryl group having 5 to 50 ring atoms, when one of R1 and R2 is a hydrogen atom, the other of either R1 or R2 is a halogen atom, a cyano group, a nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbons, a substituted or unsubstituted heteroaryl group having 5 to 50 ring atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbons, a substituted or unsubstituted cycloalkyl group having 3 to 50 carbons, a substituted or unsubstituted thio group having 1 to 50 carbons, or a substituted or unsubstituted silyl group having 1 to 50 carbons, wherein the substituted or unsubstituted aryl group having 6 to 50 ring carbons, the substituted or unsubstituted heteroaryl group having 5 to 50 ring atoms, or the substituted or unsubstituted cycloalkyl group having 3 to 50 carbons forms a saturated or unsaturated ring independently or with an adjacent group, or R1 and R2 are identical or different substituents and each represent a halogen atom, a cyano group, a nitro group, as bstituted or unsubstituted aryl group having 6 to 50 ring carbons, a substituted or unsubstituted heteroaryl group having 5 to 50 ring atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbons, a substituted or unsubstituted cycloalkyl group having 3 to 50 carbons, a substituted or unsubstituted thio group having 1 to 50 carbons, or a substituted or unsubstituted silyl group having 1 to 50 carbons, wherein the substituted or unsubstituted aryl group having 6 to 50 ring carbons, the substituted or unsubstituted heteroaryl group having 5 to 50 ring atoms, or the substituted or unsubstituted cycloalkyl group having 3 to 50 carbons forms a saturated or unsaturated ring independently or with an adjacent group, wherein a suitable substituent on the Ar1, Ar2, Ar3, R1 or R2 is a halogen atom, a cyano group, a nitro group, an aryl group having 6 to 50 ring carbons, a heteroaryl group having 5 to 50 ring atoms, an alkyl group having 1 to 50 carbons, a cycloalkyl group having 3 to 50 carbons, a thio group having 1 to 50 carbons, or a silyl group having 1 to 50 carbons, Y2 and Y3 are identical or different substituents and each represent an oxygen atom, a sulfur atom or a selenium atom, Ar4 to Ar7 are identical or different substituents and each represent a substituted or unsubstituted aryl group having 6 to 50 ring carbons, or a substituted or unsubstituted heteroaryl group having 5 to 50 ring atoms, Ar8 represents a substituted or unsubstituted aryl group having 6 to 50 ring carbons, or a substituted or unsubstituted heteroaryl group having 5 to 50 ring atoms, and when one of R3 and R4 is a hydrogen atom, the other of either R3 and R4 is a halogen atom, a cyano group, a nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbons, a substituted or unsubstituted heteroaryl group having 5 to 50 ring atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbons, a substituted or unsubstituted cycloalkyl group having 3 to 50 carbons, a substituted or unsubstituted thio group having 1 to 50 carbons, or a substituted or unsubstituted silyl group having 1 to 50 carbons, wherein the substituted or unsubstituted aryl group having 6 to 50 ring carbons, the substituted or unsubstituted heteroaryl group having 5 to 50 ring atoms, or the substituted or unsubstituted cycloalkyl group having 3 to 50 carbons forms a saturated or unsaturated ring independently or with an adjacent group, or R3 and R4 are identical or different substituents and each represent a halogen atom, a cyano group, a nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbons, a substituted or unsubstituted heteroaryl group having 5 to 50 ring atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbons, a substituted or unsubstituted cycloalkyl group having 3 to 50 carbons, a substituted or unsubstituted thio group having 1 to 50 carbons, or a substituted or unsubstituted silyl group having 1 to 50 carbons, wherein the substituted or unsubstituted aryl group having 6 to 50 ring carbons, the substituted or unsubstituted heteroaryl group having 5 to 50 ring atoms, or the substituted or unsubstituted cycloalkyl group having 3 to 50 carbons forms a saturated or unsaturated ring independently or with an adjacent group, wherein a suitable substituent on the Ar4 to Ar8, R3 or R4 is a halogen atom, a cyano group, a nitro group, an aryl group having 6 to 50 ring carbons, a heteroaryl group having 5 to 50 ring atoms, an alkyl group having 1 to 50 carbons, a cycloalkyl group having 3 to 50 carbons, a thio group having 1 to 50 carbons, or a silyl group having 1 to 50 carbons, Y4 represents an oxygen atom, a sulfur atom or a selenium atom, Ar9 represents a substituted or unsubstituted aryl group having 6 to 50 ring carbons, or a substituted or unsubstituted heteroaryl group having 5 to 50 ring atoms, Ar10 and Ar11 are identical or different substituents and each represent a substituted or unsubstituted aryl group having 6 to 50 ring carbons, or a substituted or unsubstituted heteroaryl group having 5 to 50 ring atoms, and part or all of R5 and R6 are independently a hydrogen atom, or R5 and R6 are identical or different sub stituents and each represent a halogen atom, a cyano group, a nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbons, a substituted or unsubstituted heteroaryl group having 5 to 50 ring atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbons, a substituted or unsubstituted cycloalkyl group having 3 to 50 carbons, a substituted or unsubstituted thio group having 1 to 50 carbons, or a substituted or unsubstituted silyl group having 1 to 50 carbons, wherein the substituted or unsubstituted aryl group having 6 to 50 ring carbons, the substituted or unsubstituted heteroaryl group having 5 to 50 ring atoms, or the substituted or unsubstituted cycloalkyl group having 3 to 50 carbons forms a saturated or unsaturated ring independently or with an adjacent group, wherein a suitable substituent on the Ar9 to Ar11, R5 or R6 is a halogen atom, a cyano group, a nitro group, an aryl group having 6 to 50 ring carbons, a heteroaryl group having 5 to 50 ring atoms, an alkyl group having 1 to 50 carbons, a cycloalkyl group having 3 to 50 carbons, a thio group having 1 to 50 carbons, or a silyl group having 1 to 50 carbons, Y5 and Y6 are identical or different substituents and each represent an oxygen atom, a sulfur atom or a selenium atom, Ar12 to Ar15 are identical or different substituents and each represent a substituted or unsubstituted aryl group having 6 to 50 ring carbons, or a substituted or unsubstituted heteroaryl group having 5 to 50 ring atoms, and part or all of R7 to R9 are independently a hydrogen atom, or R7 to R9 are identical or different sub substituents and each represent a halogen atom, a cyano group, a nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbons, a substituted or unsubstituted heteroaryl group having 5 to 50 ring atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbons, a substituted or unsubstituted cycloalkyl group having 3 to 50 carbons, a substituted or unsubstituted thio group having 1 to 50 carbons, or a substituted or unsubstituted silyl group having 1 to 50 carbons, wherein the substituted or unsubstituted aryl group having 6 to 50 ring carbons, the substituted or unsubstituted heteroaryl group having 5 to 50 ring atoms, or the substituted or unsubstituted cycloalkyl group having 3 to 50 carbons forms a saturated or unsaturated ring independently or with an adjacent group, wherein a suitable substituent on the Ar12 to Ar15 and R7 to R9 is a halogen atom, a cyano group, a nitro group, an aryl group having 6 to 50 ring carbons, a heteroaryl group having 5 to 50 ring atoms, an alkyl group having 1 to 50 carbons, a cycloalkyl group having 3 to 50 carbons, a thio group having 1 to 50 carbons, or a silyl group having 1 to 50 carbons, Y7 and Y8 are identical or different substituents and each represent an oxygen atom, a sulfur atom or a selenium atom, Ar16 to Ar19 are identical or different substituents and each represent a substituted or unsubstituted aryl group having 6 to 50 ring carbons, or a substituted or unsubstituted heteroaryl group having 5 to 50 ring atoms, and part or all of R10 to R12 are independently a hydrogen atom, or R10 to R12 are identical or different sub stituents and each represent a halogen atom, a cyano group, a nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbons, a substituted or unsubstituted heteroaryl group having 5 to 50 ring atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbons, a substituted or unsubstituted cycloalkyl group having 3 to 50 carbons, a substituted or unsubstituted thio group having 1 to 50 carbons, or a substituted or unsubstituted silyl group having 1 to 50 carbons, wherein the substituted or unsubstituted aryl group having 6 to 50 ring carbons, the substituted or unsubstituted heteroaryl group having 5 to 50 ring atoms, or the substituted or unsubstituted cycloalkyl group having 3 to 50 carbons forms a saturated or unsaturated ring independently or with an adjacent group, wherein a suitable substituent on the Ar16 to Ar19 and R10 to R12 is a halogen atom, a cyano group, a nitro group, an aryl group having 6 to 50 ring carbons, a heteroaryl group having 5 to 50 ring atoms, an alkyl group having 1 to 50 carbons, a cycloalkyl group having 3 to 50 carbons, a thio group having 1 to 50 carbons, or a silyl group having 1 to 50 carbons, Y9 to Y11 are identical or different substituents and each represent an oxygen atom, a sulfur atom or a selenium atom, Ar20 to Ar25 are identical or different substituents and each represent a substituted or unsubstituted aryl group having 6 to 50 ring carbons, or a substituted or unsubstituted heteroaryl group having 5 to 50 ring atoms, and part or all of R13 to R15 are independently a hydrogen atom, or R13 to R15 are identical or different sub stituents and each represent a halogen atom, a cyano group, a nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbons, a substituted or unsubstituted heteroaryl group having 5 to 50 ring atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbons, a substituted or unsubstituted cycloalkyl group having 3 to 50 carbons, a substituted or unsubstituted thio group having 1 to 50 carbons, or a substituted or unsubstituted silyl group having 1 to 50 carbons, wherein the substituted or unsubstituted aryl group having 6 to 50 ring carbons, the substituted or unsubstituted heteroaryl group having 5 to 50 ring atoms, or the substituted or unsubstituted cycloalkyl group having 3 to 50 carbons forms a saturated or unsaturated ring independently or with an adjacent group, wherein a suitable substituent on the Ar20to Ar25 and R13 to R15 is a halogen atom, a cyano group, a nitro group, an aryl group having 6 to 50 ring carbons, a heteroaryl group having 5 to 50 ring atoms, an alkyl group having 1 to 50 carbons, a cycloalkyl group having 3 to 50 carbons, a thio group having 1 to 50 carbons, or a silyl group having 1 to 50 carbons, Y12 represents an oxygen atom, a sulfur atom or a selenium atom, Ar26 and Ar27 are identical or different substituents and each represent a substituted or unsubstituted aryl group having 6 to 50 ring carbons, or a substituted or unsubstituted heteroaryl group having 5 to 50 ring atoms, and part or all of R16 to R20 are independently a hydrogen atom, or R16 to R20 are identical or different sub stituents and each represent a halogen atom, a cyano group, a nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbons, a substituted or unsubstituted heteroaryl group having 5 to 50 ring atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbons, a substituted or unsubstituted cycloalkyl group having 3 to 50 carbons, a substituted or unsubstituted thio group having 1 to 50 carbons, or a substituted or unsubstituted silyl group having 1 to 50 carbons, wherein the substituted or unsubstituted aryl group having 6 to 50 ring carbons, the substituted or unsubstituted heteroaryl group having 5 to 50 ring atoms, or the substituted or unsubstituted cycloalkyl group having 3 to 50 carbons forms a saturated or unsaturated ring independently or with an adjacent group, wherein a suitable substituent on the Ar26, Ar27 and R16 to R20 is a halogen atom, a cyano group, a nitro group, an aryl group having 6 to 50 ring carbons, a heteroaryl group having 5 to 50 ring atoms, an alkyl group having 1 to 50 carbons, a cycloalkyl group having 3 to 50 carbons, a thio group having 1 to 50 carbons, or a silyl group having 1 to 50 carbons, Y12 represents an oxygen atom, a sulfur atom or a selenium atom, Ar26 and Ar27 are identical or different substituents and each represent a substituted or unsubstituted aryl group having 6 to 50 ring carbons, or a substituted or unsubstituted heteroaryl group having 5 to 50 ring atoms, and part or all of R16 to R20 are independently a hydrogen atom, or R16 to R20 are identical or different sub stituents and each represent a halogen atom, a cyano group, a nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbons, a substituted or unsubstituted heteroaryl group having 5 to 50 ring atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbons, a substituted or unsubstituted cycloalkyl group having 3 to 50 carbons, a substituted or unsubstituted thio group having 1 to 50 carbons, or a substituted or unsubstituted silyl group having 1 to 50 carbons, wherein the substituted or unsubstituted aryl group having 6 to 50 ring carbons, the substituted or unsubstituted heteroaryl group having 5 to 50 ring atoms, or the substituted or unsubstituted cycloalkyl group having 3 to 50 carbons forms a saturated or unsaturated ring independently or with an adjacent group, wherein a suitable substituent on the Ar26, Ar27 and R16 to R20 is a halogen atom, a cyano group, a nitro group, an aryl group having 6 to 50 ring carbons, a heteroaryl group having 5 to 50 ring atoms, an alkyl group having 1 to 50 carbons, a cycloalkyl group having 3 to 50 carbons, a thio group having 1 to 50 carbons, or a silyl group having 1 to 50 carbons, Y13 and Y14 are identical or different substituents and each represent an oxygen atom, a sulfur atom or a selenium atom, Ar28 to Ar31 are identical or different substituents and each represent a substituted or unsubstituted aryl group having 6 to 50 ring carbons, or a substituted or unsubstituted heteroaryl group having 5 to 50 ring atoms, and part or all of R21 to R25 are independently a hydrogen atom, or R21 to R25 are identical or different sub stituents and each represent a halogen atom, a cyano group, a nitro group, a substituted or unsubstituted aryl group having 6 to 50 ring carbons, a substituted or unsubstituted heteroaryl group having 5 to 50 ring atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbons, a substituted or unsubstituted cycloalkyl group having 3 to 50 carbons, a substituted or unsubstituted thio group having 1 to 50 carbons, or a substituted or unsubstituted silyl group having 1 to 50 carbons, wherein the substituted or unsubstituted aryl group having 6 to 50 ring carbons, the substituted or unsubstituted heteroaryl group having 5 to 50 ring atoms, or the substituted or unsubstituted cycloalkyl group having 3 to 50 carbons forms a saturated or unsaturated ring independently or with an adjacent group, wherein a suitable substituent on the Ar28 to Al31 and R21 to R25 is a halogen atom, a cyano group, a nitro group, an aryl group having 6 to 50 ring carbons, a heteroaryl group having 5 to 50 ring atoms, an alkyl group having 1 to 50 carbons, a cycloalkyl group having 3 to 50 carbons, a thio group having 1 to 50 carbons, or a silyl group having 1 to 50 carbons. |