methyl 5-<(2,5-dihydro-3-ethyl-4-methyl-5-oxo-1H-pyrrol-2-ylidene)methyl>-1,2,4-trimethyl-1H-pyrrole-3-propanoate 在
sodium hydroxide 作用下,
反应 4.0h,
以87%的产率得到5-<(2,5-dihydro-3-ethyl-4-methyl-5-oxo-1H-pyrrol-2-ylidene)methyl>-1,2,4-trimethyl-1H-pyrrole-3-propanoic acid