InChI=1S/C21H22N4O7/c1-4-32-17-14-15(11-6-5-10(8-22)7-13(11)31-3)21(30,19(23)28)20(2,29)25-16(14)12(9-24-17)18(26)27/h5-7,9,15,25,29-30H,4H2,1-3H3,(H2,23,28)(H,26,27)/t15-,20?,21?/m0/s1