甲醇 、
4'-bromo-2-bromomethyl-4-methyl-2',5'-dioxo-1'-phenyl-2',5'-dihydro-1H,1'H-[3,3']bipyrrolyl-5-carboxylic acid ethyl ester 生成 4'-bromo-2-methoxymethyl-4-methyl-2',5'-dioxo-1'-phenyl-2',5'-dihydro-1
H,1'
H-[3,3']bipyrrolyl-5-carboxylic acid ethyl ester