| 主权项 |
1. Ink comprising:
at least one of a compound represented by chemical formula 1, a compound represented by chemical formula 2, a compound represented by chemical formula 3, or a compound represented by chemical formula 4, where R1 represents a hydrocarbon group having 1 to 10 carbon atoms and R2 represents a monovalent group comprising a group represented by —OX1, where X1 represents a monovalent hydrocarbon group having 1 to 10 carbon atoms, a monovalent group comprising a group represented by —COOX2, where X2 represents a monovalent hydrocarbon group having 1 to 10 carbon atoms, a monovalent group comprising a group represented by —OCOX3, where X3 represents a monovalent hydrocarbon group having 1 to 10 carbon atoms, a monovalent group comprising a group represented by —NX4X5, where X4 and X5 each, independently represent monovalent hydrocarbon groups having 1 to 10 carbon atoms, a monovalent group comprising a group represented by —CONX6X7, where X6 and X7 each, independently represent monovalent hydrocarbon groups having 1 to 10 carbon atoms, or a monovalent group comprising a hydroxyl group, where, R3 and R4 each, independently represent monovalent groups comprising groups represented by —OX1, where X1 represents a monovalent hydrocarbon group having 1 to 10 carbon atoms, a monovalent group comprising a group represented by —COOX2, where X2 represents a monovalent hydrocarbon group having 1 to 10 carbon atoms, a monovalent group comprising a group represented by —OCOX3, where X3 represents a monovalent hydrocarbon group having 1 to 10 carbon atoms, a monovalent group comprising a group represented by —NX4X5, where X4 and X5 each, independently represent monovalent hydrocarbon groups having 1 to 10 carbon atoms, a monovalent group comprising a group represented by —CONX6X7, where X6 and X7 each, independently represent monovalent hydrocarbon groups having 1 to 10 carbon atoms, or a monovalent group comprising a hydroxyl group, where a ring A represents a saturated five-membered ring or a saturated six-membered ring, both comprising a nitrogen atom, R5 represents a monovalent group comprising a group represented by —OX1, where X1 represents a monovalent hydrocarbon group having 1 to 10 carbon atoms, a monovalent group comprising a group represented by —COOX2, where X2 represents a monovalent hydrocarbon group having 1 to 10 carbon atoms, a monovalent group comprising a group represented by —OCOX3, where X3 represents a monovalent hydrocarbon group having 1 to 10 carbon atoms, a monovalent group comprising a group represented by —NX4X5, where X4 and X5 each, independently represent monovalent hydrocarbon groups having 1 to 10 carbon atoms, a monovalent group comprising a group represented by —CONX6X7, where X6 and X7 each, independently represent monovalent hydrocarbon groups having 1 to 10 carbon atoms, or a monovalent group comprising a hydroxyl group, and a is 1, 2, or 3, and where a ring B represents a saturated five-membered ring or a saturated six-membered ring, both comprising two nitrogen atoms, R6 represents a monovalent group comprising a group represented by —OX1, where X1 represents a monovalent hydrocarbon group having 1 to 10 carbon atoms, a monovalent group comprising a group represented by —COOX2, where X2 represents a monovalent hydrocarbon group having 1 to 10 carbon atoms, a monovalent group comprising a group represented by —OCOX3, where X3 represents a monovalent hydrocarbon group having 1 to 10 carbon atoms, a monovalent group comprising a group represented by —NX4X5, where X4 and X5 each, independently represent monovalent hydrocarbon groups having 1 to 10 carbon atoms, a monovalent group comprising a group represented by —CONX6X7, where X6 and X7 each, independently represent monovalent hydrocarbon groups having 1 to 10 carbon atoms, a monovalent group comprising a hydroxyl group, or an alkyl group having 1 to 10 carbon atoms. |
