InChI=1S/C14H18O8S/c1-8-3-10(15)7-13(21-8)14(22-23(17,18)19)9-4-11(16)6-12(5-9)20-2/h4-6,8,13-14,16H,3,7H2,1-2H3,(H,17,18,19)