3,16-Diisobutyryl-4-veratroylveracevin 4,9-Epoxycevane-3-beta,4-beta,12,14,16-beta,17,20-heptol 3,16-diisobutyrate 4-veratrate Cevane-3-beta,4-beta,12,14,16-beta,17,20-heptol, 4,9-epoxy-, 3,16-diisobutyrate 4-veratrate FL4920500