3-(2-Allyloxycarbonyl-ethyl)-4-methyl-5-[3-methyl-5-oxo-4-[2-(toluene-4-sulfinyl)-ethyl]-1,5-dihydro-pyrrol-(2Z)-ylidenemethyl]-1H-pyrrole-2-carboxylic acid tert-butyl ester

1,5-dihydro-4-methyl-3-[2-(tolylthio)ethyl]-5-tosyl-2H-pyrrol-2-one

3-Methyl-2-(toluene-4-sulfonyl)-4-(2-p-tolylsulfanyl-ethyl)-1H-pyrrole

2-Bromo-4-methyl-5-(toluene-4-sulfonyl)-3-(2-p-tolylsulfanyl-ethyl)-1H-pyrrole

2-Bromo-4-methyl-3-[2-(toluene-4-sulfinyl)-ethyl]-5-(toluene-4-sulfonyl)-1H-pyrrole