4-(2-Benzyloxycarbonyl-ethyl)-3,5-dimethyl-1H-pyrrole-2-carboxylic acid benzyl ester
3-(5-Benzyloxycarbonyl-2,4-dimethyl-pyrrol-3-yl)-propionsaeure-benzylester
3-(5-benzyloxycarbonyl-2,4-dimethyl-pyrrol-3-yl)-propionic acid benzyl ester
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