InChI=1S/C21H24N2O3/c1-22-19-8-16-14-5-4-13(25-3)6-18(14)23(2)21(16)20(22)7-15-12(9-24)10-26-11-17(15)19/h4-6,9-10,15,17,19-20H,7-8,11H2,1-3H3