InChI=1S/C18H22O8S/c1-17-4-5-18(22)11-3-2-10(26-27(23,24)25)6-9(11)7-13(19)15(18)12(17)8-14(20)16(17)21/h2-3,6,12-15,19-20,22H,4-5,7-8H2,1H3,(H,23,24,25)/t12?,13?,14?,15?,17-,18?/m0/s1