77732-43-5 PR Toxin amide PR-Amide Spiro(naphth(1,2-b)oxirene-5(1aH),2'-oxirane)-3'-carboxamide, 2-(acetyloxy)-2,3,3a,4,6,7b-hexahydro-3,3',3a-trimethyl-6-oxo-, (1aR-(1aalpha,2beta,3beta,3abeta,5beta(S*),7balpha))-