InChI=1/C21H22N2O3/c1-19(2)20(3)11-12-21(19,17(24)16(20)23-26)18(25)22-15-10-6-8-13-7-4-5-9-14(13)15/h4-10,26H,11-12H2,1-3H3,(H,22,25)/b23-16+/t20-,21+/m1/s1/f/h22H F4DC03175792DAC7