InChI=1S/C21H24N2O4/c1-11-14(9-24)13-7-19-21(8-17(22-19)15(13)10-27-11)16-5-4-12(26-3)6-18(16)23(2)20(21)25/h4-6,9,13,15,17,19,22H,7-8,10H2,1-3H3/t13-,15+,17-,19-,21-/m0/s1