InChI=1/C18H16N2O3/c1-10-5-4-6-16(11(10)2)20-17(22)14-8-7-13(19-12(3)21)9-15(14)18(20)23/h4-9H,1-3H3,(H,19,21)/f/h19H 38B25C49D156C010