14287-83-3 26133-14-2 3a,4b,7a,15-Tetracetoxy-12,13-epoxy-trichothec-9-en-8-one NSC 267035 Nivalenol tetraacetate Tetra-Ac-niv Trichothec-9-en-8-one, 3,4,7,15-tetrakis(acetyloxy)-12,13-epoxy-, (3alpha,4beta,7alpha)-