NSC331120 Trichothec-9-ene-4,15-diol, 12,13-epoxy-, 4-[6-[2-(2,5-dihydro-5-oxo-3-furanyl)ethoxy]-7-hydroxy-2,4-octadienoate], (4.alpha.)- Trichothec-9-ene-4,15-diol, 12,13-epoxy-, cyclic ester