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