methyl 4-hydroxy-5-nitro-hexanoate

(Z)-8-ethyl-3-(2-methoxycarbonylethyl)-2,7,9-trimethyl-(10H)-dipyrrin-1-one

tert-butyl 3-(2-methoxycarbonylethyl)-4-methylpyrrole-2-carboxylate

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

3-{5-[4-Ethyl-3-methyl-5-oxo-1,5-dihydro-pyrrol-(2Z)-ylidenemethyl]-4-methyl-2H-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

4-(2-methoxycarbonylethyl)-3-methyl-3-pyrrolin-2-one

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

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

5-[Allyloxycarbonyl-(triphenyl-λ5-phosphanylidene)-methyl]-3-(2-methoxycarbonyl-ethyl)-4-methyl-1H-pyrrole-2-carboxylic acid tert-butyl ester

methyl 5-nitro-4-hexenoate

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

4-(2-methoxycarbonylethyl)-3-methyl-5-(p-toluenesulfonyl)-3-pyrrolin-2-one