InChI=1S/C17H19NO8S/c19-13-4-1-11(2-5-13)7-8-18-17(22)16(26-27(23,24)25)10-12-3-6-14(20)15(21)9-12/h1-6,9,16,19-21H,7-8,10H2,(H,18,22)(H,23,24,25)