InChI=1/C17H20O12S/c1-27-11-6-9(2-4-10(11)18)3-5-14(19)28-12-7-17(23,16(21)22)8-13(15(12)20)29-30(24,25)26/h2-6,12-13,15,18,20,23H,7-8H2,1H3,(H,21,22)(H,24,25,26)/b5-3+