InChI=1/C18H20N2O3/c1-6-23-18(22)13-8-14(21)15-16(19-13)9(2)7-12-10(3)11(4)20(5)17(12)15/h7-8H,6H2,1-5H3,(H,19,21)/f/h19H 6FDCDDD3F17FCCB8