InChI=1S/C18H20O8S/c1-17-5-4-12-11-3-2-10(19)6-9(11)7-15(26-27(23,24)25)18(12,22)14(17)8-13(20)16(17)21/h2-3,6,12,14-15,19,22H,4-5,7-8H2,1H3,(H,23,24,25)/t12?,14?,15?,17-,18?/m0/s1