InChI=1S/C18H20O8S/c1-17-5-4-12-11-3-2-10(26-27(23,24)25)6-9(11)7-13(19)15(12)18(17,22)8-14(20)16(17)21/h2-3,6,12-13,15,19,22H,4-5,7-8H2,1H3,(H,23,24,25)/t12?,13?,15?,17-,18?/m1/s1