InChI=1/C16H16N2O3/c1-18-13(8-10-16(20)17-21)7-9-14(18)15(19)11-12-5-3-2-4-6-12/h2-10,21H,11H2,1H3,(H,17,20)/b10-8+/f/h17H 87D1232EA1556766