Patent ID: 8877354

Claim:
A heterocyclic compound represented by general formula [1]: (wherein R 1 and R 2 each independently represent a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group having three or less rings, or a substituted or unsubstituted heterocyclic group having three or less rings; R 1 and R 2 may be the same as or different from each other; R 3 and R 4 each independently represent a hydrogen atom, a substituted or unsubstituted aryl group having three or less rings, or a substituted or unsubstituted heterocyclic group having three or less rings; one of R 3 and R 4 represents a substituted or unsubstituted aryl group having three or less rings or a substituted or unsubstituted heterocyclic group having three or less rings; and R 3 and R 4 may be the same as or different from each other).