InChI=1S/C24H24N2O5/c1-15-11-17(19-5-3-4-6-21(19)25-15)14-31-18-9-7-16(8-10-18)12-24(23(28)30-2)13-20(24)22(27)26-29/h3-11,20,29H,12-14H2,1-2H3,(H,26,27)/t20-,24+/m1/s1