(3-beta,6-beta,12-beta,14R)Grayanotox-10(20)-ene-3,5,6,12,14,16-hexol 33880-98-7 Grayanotox-10(20)-ene-3,5,6,12,14,16-hexol, (3-beta,6-beta,12-beta,14R)- Grayanotoxin XI