InChI=1S/C21H22N2O8/c22-21(29)23-12-7-3-1-5-10(12)9-14(11-6-2-4-8-13(11)23)30-20-17(26)15(24)16(25)18(31-20)19(27)28/h1-8,14-18,20,24-26H,9H2,(H2,22,29)(H,27,28)/t14-,15-,16-,17+,18-,20?/m1/s1