(4beta,5beta,6beta,22R)-5,6-Epoxy-4,20,22-trihydroxy-1-oxoergosta-2,24-dien-26-oic acid, delta-lactone 30655-48-2 5,6-Epoxy-4,20,22-trihydroxy-1-oxoergosta-2,24-dien-26-oic acid delta-lactone NSC 179841 Withanolide D