5-<5-(5-tert-Butoxycarbonyl-4-ethyl-3-methyl-2H-pyrrolidenmethyl)-4-ethyl-3-methyl-2-pyrrolylmethylen>-4-ethyl-3-methyl-3-pyrrolin-2-on

benzyl 13-(2-chloroethyl)-3,8-diethyl-7,12,14-trimethyl-5,16-dihydrotripyrrin-1-carboxylate

5-acetoxy-4-(1-bromomethyl)-5-(t-butoxycarbonyl)-1,5-dihydro-3-methyl-2H-pyrrol-2-one

1,5-dihydro-3-methyl-5-tosyl-4-(1-tosylethyl)-2H-pyrrol-2-one

tert-butyl 3-ethyl-5-iodo-4-methylpyrrole-2-carboxylate