2-Butenoic acid, 2-((acetyloxy)methyl)-, 2,3,3a,4,5,6,9,11a-octahydro-9-hydroxy-6,10-dimethyl-3-methylene-2-oxo-6,9-epoxycyclodeca(b)furan-4-yl ester, (3aR-(3aR*,4R*(Z),6S*,9R*,10Z,11aR*))- 34175-79-6 Liatrin Liatris lactone NSC 135034