InChI=1S/C21H28N2O8/c1-4-5-7-14-17(25)12(3)31-21(29)16(11(2)30-20(14)28)23-19(27)13-8-6-9-15(18(13)26)22-10-24/h6,8-12,14,16-17,25-26H,4-5,7H2,1-3H3,(H,22,24)(H,23,27)/t11-,12+,14-,16+,17+/m1/s1