(22R)-5,6β-Epoxy-4β,22-dihydroxy-1-oxo-5β-ergosta-2,14,24-trien-26-oic acid δ-lactone

(22R)-1-Oxo-4β,22-dihydroxy-5,6β-epoxy-5β-ergosta-2,14,24-triene-26-oic acid δ-lactone