InChI=1/C16H18O12S/c17-9-5-8(1-3-11(9)28-29(24,25)26)2-4-13(19)27-12-7-16(23,15(21)22)6-10(18)14(12)20/h1-5,10,12,14,17-18,20,23H,6-7H2,(H,21,22)(H,24,25,26)/b4-2+/t10-,12-,14-,16+/s2