<4R*(1S*,2S*,4R*,6S*,7R*,8R*),2E>-2-methyl-4-(1,2,7-trimethyl-5-oxo-3,9,10-trioxatricyclo<4.3.1.0(2,4)>dec-8-yl)-2-penten-1-yl acetate

<1R*-<1β,2α,4α,6β,7α,8β(1E,2E,4E,6R*)>>-1-(2,4-dimethoxybenzyl)-3-<1-hydroxy-4-methyl-6-(1,2,7-trimethyl-5-oxo-3,9,10-trioxatricyclo<4.3.1.0(2,4)>dec-8-yl)-2,4-heptadienylidene>-2,4-pyrrolidinedione