Patent ID: 7435859

Claim:
A compound represented by a below-described general formula (1), a tautomer of the compound, a stereoisomer of the compound, or a salt of any of the compound, the tautomer and the stereoisomer, where, in the formula (1), all of the A 1 to A 6 are hydrogen atoms, X 1 to X 3 are the same or different, and each of the X 1 to X 3 may be a methylene group (a below formula (2)) or a vinylidene group (a below formula (3)), in a case where a hydrogen atom exists on any of the X 1 to X 3 , the hydrogen atom may be substituted by a substituent, the substituents on the X 1 to X 3 are the same or different, and each of the substituents on the X 1 to X 3 is a straight or branched chain that has a substituent and is saturated or unsaturated, a carbocyclic ring with the number of ring atoms of 3 to 20 (the ring may be a monocyclic ring or a condensed ring, may be saturated or unsaturated, and may or may not comprise a substituent), a hydroxy group or a straight or branched unsaturated hydrocarbon group with the carbon number of 2 to 6.