322642-70-6
322642-42-2
3-(2-allyloxycarbonyl-ethyl)-5-[allyloxycarbonyl-(3-ethylidene-5-oxo-pyrrolidin-2-ylidene)-methyl]-4-methyl-1H-pyrrole-2-carboxylic acid tert-butyl ester
215872-10-9
322642-63-7
3-(2-allyloxycarbonyl-ethyl)-5-[allyloxycarbonyl-(3-ethylidene-4,4-dimethyl-5-oxo-pyrrolidin-2-ylidene)-methyl]-4-methyl-1H-pyrrole-2-carboxylic acid tert-butyl ester
322642-64-8
3-(2-allyloxycarbonyl-ethyl)-5-[allyloxycarbonyl-(4-ethyl-3-ethylidene-5-oxo-pyrrolidin-2-ylidene)-methyl]-4-methyl-1H-pyrrole-2-carboxylic acid tert-butyl ester