1H-pyrrolo[2,1-a]isoindole-3-carboxylic acid, 1-cyano-2,3,5,9b-tetrahydro-9b-hydroxy-3-methyl-5-oxo-, methyl ester, (1S,3S,9bS)- InChI=1/C15H14N2O4/c1-14(13(19)21-2)7-9(8-16)15(20)11-6-4-3-5-10(11)12(18)17(14)15/h3-6,9,20H,7H2,1-2H3/t9-,14-,15-/m0/s methyl rel-(1R,3R,9bR)-1-cyano-9b-hydroxy-3-methyl-5-oxo-2,3,5,9b-tetrahydro-1H-pyrrolo[2,1-a]isoindole-3-carboxylate