16,24-Cyclo-13,14-secoergost-2-ene-18,26-dioic acid, 14,17:14,27-diepoxy-5,6,13,20,22-pentahydroxy-1,15-dioxo-, .gamma.-lactone .delta.-lactone, (5.alpha.,6.beta.,14.alpha.,16.beta.,22.alpha.,25S)- 16,24-Cyclo-13,14-secoergost-2-ene-18,26-dioic acid, 14,17:14,27-diepoxy-5,6,13,20,22-pentahydroxy-1,15-dioxo-, .gamma.-lactone, .delta.-lactone 54980-22-2 NSC288728 PHYSALIN D