3,16-Diveratroylveracevin 4,9-Epoxycevane-3-beta,4-beta,12,14,16-beta,17,20-heptol 3,4-diveratrate Cevane-3-beta,4-beta,12,14,16-beta,17,20-heptol, 4,9-epoxy-, 3,4-diveratrate FL4924800