Patent ID: 7420065

Claim:
A hetero-polycyclic compound represented by the following Formula (I): wherein R 1 and R 2 each represent independently an alkyl group having 1 to 10 carbon atoms which may have a substituent, an arylalkyl group having 7 to 30 carbon atoms which may have a substituent, an aryl group having 6 to 20 carbon atoms which may have a substituent or a heteroaryl group having 5 to 20 carbon atoms which may have a substituent, and they may be combined with each other to form a cyclic structure or may form a cyclic structure together with a benzene ring to which a nitrogen atom is bonded; and X represents an oxygen atom, a sulfur atom, —NH— or —NR 3 — (R 3 represents an alkyl group having 1 to 10 carbon atoms which may have a substituent, an aryl group having 6 to 20 carbon atoms which may have a substituent or a heteroaryl group having 5 to 20 carbon atoms which may have a substituent).