InChI=1S/C16H17NO8S/c18-14(8-6-12-4-2-1-3-5-12)17-10-13(7-9-15(17)19)25-16(20)11-24-26(21,22)23/h1-5,7,9,13H,6,8,10-11H2,(H,21,22,23)