InChI=1S/C18H22N2O8/c1-8(21)19-5-4-9-7-20-12-3-2-10(6-11(9)12)27-18-15(24)13(22)14(23)16(28-18)17(25)26/h2-3,6-7,13-16,18,20,22-24H,4-5H2,1H3,(H,19,21)(H,25,26)/t13-,14-,15+,16-,18?/m0/s1