2-Butenoic acid, 2-methyl-, 1a,1b,4,4a,5,7a,7b,8,9,9a-decahydro-7b,9a-dihydroxy-1,1,6,8-tetramethyl-3-((2-methyl-1-oxopropoxy)methyl)-5-oxo-1H-cyclopropa(3,4)benz(1,2-e)azulen-9-yl ester, (1aR-(1aalpha,1bbeta,4abeta,7aalpha,7balpha,8alpha,9beta(E),9aalpha))- 76343-70-9