| 摘要 |
Provided is a novel heterocyclic compound which is useful as a material for an organic electroluminescent device. The heterocyclic compound is represented by the general formula [I]: wherein X represents a nitrogen atom or a carbon atom; Y represents O or S; R<SUB>1 </SUB>and R<SUB>2 </SUB>each represent, independently of one another, a group selected from the group consisting of a substituted or unsubstituted alkyl group and the like; a represents 0 or more and 3 or less; b represents 0 or more and 3 or less; and Ar<SUB>1 </SUB>represents a substituted or unsubstituted heterocyclic ring or the like; and n represents an integer of 2 to 10.
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