lasiocarpine N-oxide

(1S)-1β-[(Z)-2-Methyl-2-butenoyloxy]-2,3,5,7aβ-tetrahydro-7-[[[(2R)-2,3-dihydroxy-2-[(S)-1-methoxyethyl]-3-methylbutanoyl]oxy]methyl]-1H-pyrrolizine 4-oxide