InChI=1/C21H24N2O4/c1-26-21(25)19-14-16-4-2-3-5-18(16)23(19)20(24)11-8-15-6-9-17(10-7-15)27-13-12-22/h6-11,16,18-19H,2-5,13-14H2,1H3/b11-8+/t16-,18+,19-/m1/s1 D2989B7232B2EC43