InChI=1S/C16H20N2O8S/c1-8(19)26-6-9-7-27-15-12(14(23)18(15)13(9)16(24)25)17-10(20)4-2-3-5-11(21)22/h12,15H,2-7H2,1H3,(H,17,20)(H,21,22)(H,24,25)/t12-,15-/m1/s1