Patent ID: 8263236

Claim:
A compound represented by the following formula (IV) or (V): wherein each of X 1 and X 2 independently represents an oxygen atom, a sulfur atom or a selenium atom, each of R 41 , R 42 , R 43 , R 44 , R 45 , R 46 , R 47 , R 48 , R 49 , R 50 , R 51 , R 52 , R 53 , R 54 , R 55 , and R 56 independently represents a hydrogen atom, an alkyl group, a cycloalkyl group, an aryl group, a fluorine atom, or a cyano group, and A 41 represents —C(R 81 )(R 82 )—, wherein each of X 3 and X 4 independently represents an oxygen atom, a sulfur atom or a selenium atom, each of R 61 , R 62 , R 63 , R 64 , R 65 , R 66 , R 67 , R 68 , R 69 , R 70 , R 71 , R 72 , R 73 , R 74 , R 75 , and R 76 independently represents a hydrogen atom, an alkyl group, a cycloalkyl group, an aryl group, a fluorine atom, or a cyano group, A 51 represents —C(R 81 )(R 82 )—, and each of R 81 and R 82 independently represents a hydrogen atom or a substituent selected from the Substituent group A, wherein the Substituent group A consists of an alkyl group, a cycloalkyl group, an alkenyl group, an alkynyl group, an aryl group, an amino group, an alkoxy group, an aryloxy group, a heterocyclic oxy group, an acyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, an acyloxy group, an acylamino group, an alkoxycarbonylamino group, an aryloxycarbonylamino group, a sulfonylamino group, a sulfamoyl group, a carbamoyl group, an alkylthio group, an arylthio group, a heterocyclic thio group, a sulfonyl group, a sulfinyl group, a ureido group, a phosphoric acid amide group, a hydroxy group, a mercapto group, a halogen atom, a cyano group, a sulfo group, a carboxyl group, a nitro group, a hydroxamic acid group, a sulfino group, a hydrazino group, an imino group, a heterocyclic group, a silyl group, and a silyloxy group.