| 摘要 |
A 2,4,5-triphenylimidazole compound having the formula: <CHEM> wherein each of R1 to R5 is a hydrogen atom, a C1-C4 alkyl group, a C1-C4 alkoxy group, a fluorine atom, a chlorine atom, a bromine atom, a trifluoromethyl group or a trichloromethyl group, and A is a hydrogen atom or a group having the formula: <CHEM> wherein R1 to R5 are as defined above. t |
