methyl 5-nitro-4-hexenoate

3-(5-{Allyloxycarbonyl-[3-eth-(E)-ylidene-4-methyl-5-oxo-pyrrolidin-(2E)-ylidene]-methyl}-2-formyl-4-methyl-1H-pyrrol-3-yl)-propionic acid methyl ester

5-{Allyloxycarbonyl-[3-eth-(E)-ylidene-4-methyl-5-oxo-pyrrolidin-(2E)-ylidene]-methyl}-3-(2-methoxycarbonyl-ethyl)-4-methyl-1H-pyrrole-2-carboxylic acid tert-butyl ester

5-(Allyloxycarbonyl-hydroxy-methyl)-3-(2-methoxycarbonyl-ethyl)-4-methyl-1H-pyrrole-2-carboxylic acid tert-butyl ester

5-bromo-3-(2-methoxycarbonylethyl)-4-methyl-2-(p-toluenesulfonyl)-1H-pyrrole