5b-Ergosta-2,24-dien-26-oic acid,5,6b-epoxy-22,27-dihydroxy-1,4-dioxo-,d-lactone, (20S,22R)- (8CI);Ergosta-2,24-dien-26-oic acid, 5,6-epoxy-22,27-dihydroxy-1,4-dioxo-, d-lactone (7CI);4-Dehydrowithaferin A
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