| abstract |
The present invention relates to a compound represented by the formula (1 A ). G represents a group selected from the group consisting of a monovalent group represented by the formula (G P ) and a monovalent group represented by the formula (G S ). R 4 , R 5 , R 6 , R 7 , R 8 , R 9 , R 10 , R 11 , and R 12 each independently represent a hydrogen atom or a group selected from the group consisting of an alkyl group, an alkenyl group, an aryl group, an aralkyl group, an alkoxy group, a halogeno group, and a halogeno alkyl group. |