InChI=1S/C22H28N2O4/c1-24(12-13-2-3-13)9-8-21-11-15(25)6-7-22(21,28)17(24)10-14-4-5-16(20(23)27)19(26)18(14)21/h4-5,13,17,28H,2-3,6-12H2,1H3,(H2-,23,26,27)/p+1/t17-,21-,22-,24-/m1/s1