InChI=1S/C16H18O12S/c17-9-3-1-8(5-10(9)18)2-4-13(21)27-16(15(22)23)6-11(19)14(12(20)7-16)28-29(24,25)26/h1-5,11-12,14,17-20H,6-7H2,(H,22,23)(H,24,25,26)/b4-2+/t11?,12?,14?,16-