15-Acetoxy-3-hydroxy-3,4-O,O-ethylidene-12,13-epoxytrichothec-9-ene 79320-89-1 Trichothec-9-ene-3,3,4,15-tetrol, 12,13-epoxy-, cyclic 3,4-(ethylidene acetal), 15-acetate, (3beta(S),4beta)-