144674-69-1 3-(2,3-(Isopropylidenedioxy)-4-(pivaloxymethyl)cyclopentyl)maleimide Idpm-C5MI Propanoic acid, 2,2-dimethyl-, (6-(2,5-dihydro-2,5-dioxo-1H-pyrrol-3-yl)tetrahydro-2,2-dimethyl-4H-cyclopenta-1,3-dioxol-4-yl)methyl ester, (3aR-(3aalha,4alpha,6alpha,6aalpha))-