4a-(acetyloxy)-7b,9a-dihydroxy-3-(hydroxymethyl)-1,1,6,8-tetramethyl-1a,1b,4,4a,5,7a,7b,8,9,9a-decahydro-1H-cyclopropa[3,4]benzo[1,2-e]azulen-9-yl (2E)-2-methylbut-2-enoate
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