5-Formyl-4-(2-methoxycarbonylethyl)-2-((2S,3S)-3-methoxycarbonylmethyl-3-methyl-5-oxotetrahydrofuran-2-yl)formyl-3-methylpyrrole

3-(2-Methoxycarbonyl-ethyl)-4-methyl-5-((3aR,6aS)-3a-methyl-2,5-dioxo-hexahydro-furo[2,3-b]pyrrol-6a-ylmethyl)-1H-pyrrole-2-carboxylic acid tert-butyl ester

(4S,5S)-4-Allyl-5-hydroxymethyl-4-methyl-dihydro-furan-2-one