1-(hydroxymethyl)-7-methoxy-6-methylisoquinoline-5,8-dione 5,8-isoquinolinedione, 1-(hydroxymethyl)-7-methoxy-6-methyl- InChI=1/C12H11NO4/c1-6-10(15)7-3-4-13-8(5-14)9(7)11(16)12(6)17-2/h3-4,14H,5H2,1-2H