3-isoquinolinecarboxylic acid, 1,2-dihydro-1-oxo-, methyl ester InChI=1/C11H9NO3/c1-15-11(14)9-6-7-4-2-3-5-8(7)10(13)12-9/h2-6H,1H3,(H,12,13 methyl 1-oxo-1,2-dihydroisoquinoline-3-carboxylate