InChI=1S/C16H16O10S/c1-7(14(20)13-11(19)5-8(17)6-12(13)25-2)9-3-4-10(18)16(15(9)21)26-27(22,23)24/h3-7,17-19,21H,1-2H3,(H,22,23,24)