22509-74-6 2H-isoindole-2-carboxylic acid, 1,3-dihydro-1,3-dioxo-, ethyl ester InChI=1/C11H9NO4/c1-2-16-11(15)12-9(13)7-5-3-4-6-8(7)10(12)14/h3-6H,2H2,1H PHTHALIC ACID,IMIDE,N-ETHOXYCARBONYL ethyl 1,3-dioxo-1,3-dihydro-2H-isoindole-2-carboxylate