3,16-Diisovalerylveracevin 4,9-Epoxycevane-3-beta,4-beta,12,14,16-beta,17,20-heptol 3,16-diisovalerate Cevane-3-beta,4-beta,12,14,16-beta,17,20-heptol, 4-9-epoxy-, 3,16-diisovalerate FL4921500