InChI=1S/C22H22N2O6/c1-28-18(26)22(27)17(25)19-5-2-9-24-10-8-20(16(19)24)12-3-4-13-15(30-11-29-13)14(12)23-21(20,22)7-6-19/h2-5,16,23,27H,6-11H2,1H3/t16-,19-,20+,21-,22+/m0/s1