((3R,3aS,4S,6aS)-4-((2R,3R)-3-(ethanoyloxy)-4-hydroxy-2-methylbutyl)-3a-hydroxy-1,3-dimethyl-2,6-dioxohexahydro-1H-furo[3,4-b]pyrrol-6a-yl)methyl ethanoate

((3R,3aS,4S,6aS)-4-((2R,3R)-3-(ethanoyloxy)-2-methyl-4-oxobutyl)-3a-hydroxy-1,3-dimethyl-2,6-dioxohexahydro-1H-furo[3,4-b]pyrrol-6a-yl)methyl ethanoate