InChI=1S/C18H20O8S/c1-18-3-2-9-10-6-13(20)12(19)4-8(10)5-15(26-27(23,24)25)16(9)11(18)7-14(21)17(18)22/h4,6,9,11,15-16,19-20H,2-3,5,7H2,1H3,(H,23,24,25)/t9?,11?,15?,16?,18-/m0/s1