3,4-Diacetylveracevin 4,9-Epoxycevane-3-beta,4-beta,12,14,16-beta,17,20-heptol 3,4-diacetate Cevane-3-beta,4-beta,12,14,16-beta,17,20-heptol, 4,9-epoxy-, 3,4-diacetate FL4915000