5-[[3-ethyl-4-methyl-5-[(2-methylpropan-2-yl)oxycarbonyl]-1H-pyrrol-2-yl]methyl]-4-methyl-1H-pyrrole-2-carboxylic acid 在
对甲苯磺酸 作用下,
生成 3-{5-[5-{3-Ethyl-5-[4-ethyl-3,5-dimethyl-pyrrol-(2Z)-ylidenemethyl]-4-methyl-1H-pyrrol-2-ylmethyl}-4-methyl-pyrrol-(2Z)-ylidenemethyl]-2,4-dimethyl-1H-pyrrol-3-yl}-propionic acid methyl ester; hydrobromide