上游原料
1,3-dihydro-2H-indol-2-oneethyl 4-(3-ethoxy-3-oxopropyl)-3,5-dimethyl-1H-pyrrole-2-carboxylate4-(2-carboxyethyl)-3,5-dimethyl-1H-pyrrole-2-carboxylic acid3-(2,4-dimethyl-1H-pyrrol-3-yl)propionic acid3-(5-formyl-2,4-dimethyl-1H-pyrrol-3-yl)propionic acid3-[2,4-dimethyl-5-[(2-oxo-2,3-dihydro-1H-indol-3-yl)(1-pyrrolidinyl)methyl]-1H-pyrrol-3-yl]propionic acid
