(11S)-6α-Hydroxy-3-oxoeudesma-1,4-dien-12-oic acid γ-lactone oxime

(3S)-8-Hydroxyimino-3aβ,4,5,5a,8,9bα-hexahydro-3β,5aα,9-trimethylnaphtho[1,2-b]furan-2(3H)-one