InChI=1S/C19H18O8S/c1-11(27-28(23,24)25)17(20)15(12-7-3-2-4-8-12)16-18(21)13-9-5-6-10-14(13)26-19(16)22/h2-11,15,17,20,22H,1H3,(H,23,24,25)