InChI=1S/C17H17NO8S/c19-12-5-1-11(2-6-12)15-16(25-15)17(21)18-9-14(20)10-3-7-13(8-4-10)26-27(22,23)24/h1-8,14-16,19-20H,9H2,(H,18,21)(H,22,23,24)