97042-20-1 (3R,3aα,5aα,9aβ,11aα,12R)-3β,3bβ-(Epoxymethano)-4α,12-dihydroxy-3a,3b,4,5,5a,6,7,8,9,9a,9bα,10,11,11a-tetradecahydro-6,6,9a-trimethylphenanthro[1,2-c]furan-1(3H)-one 4-butyrate 39940-16-4 Poly[(1,3-dihydro-1,3-dioxo-2H-isoindole-2,5- diyl)[2,2,2-trifluoro-1-(trifluoromethyl)ethylidene]( 1,3-dihydro-1,3-dioxo-2H-isoindole- 5,2-diyl)-1,4-phenyleneoxy-1,4-phenylene]