1(2H)-ISOQUINOLINONE, 5,6,7,8-TETRAHYDRO-3-HYDROXY-4-(1-IMINOMETHYL)-2-METHYL- 5,6,7,8-Tetrahydro-3-hydroxy-4-(1-iminomethyl)-2-methylisoquinolin-1(2H)-one 89246-47-9