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