Patent ID: 7883786

Claim:
A biphenyl derivative represented by the following general formula (1): wherein R 1 , R 2 , R 4 to R 6 and R 8 to R 10 each independently represent a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted alkynyl group or a substituted or unsubstituted alkoxyl group; R 3 and R 7 each independently represent a hydrogen atom, a substituted or unsubstituted alkyl group or a substituted or unsubstituted aryl group; and X 1 and X 2 each independently represent —CR 11 R 12 —, wherein R 11 and R 12 each independently represent a hydrogen atom, an alkyl group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted heterocyclic group or a halogen atom.