InChI=1S/C15H16N2O8S/c18-14(19)11-5-8-7-3-1-2-4-9(7)17-13(8)10(16-11)6-12(15(20)21)25-26(22,23)24/h1-4,10-12,16-17H,5-6H2,(H,18,19)(H,20,21)(H,22,23,24)