InChI=1S/C19H22O8S/c1-6-18(2,3)12-8-10-7-11-14(9-13(10)26-17(12)20)25-16(19(4,5)21)15(11)27-28(22,23)24/h6-9,15-16,21H,1H2,2-5H3,(H,22,23,24)