InChI=1S/C20H24N2O4/c1-4-15-12-8-18-20(9-16(21-15)13(12)10-26-18)14-6-5-11(24-2)7-17(14)22(25-3)19(20)23/h5-7,12-13,16,18H,4,8-10H2,1-3H3/t12-,13+,16+,18-,20+/m1/s1