InChI=1S/C16H18O13S/c1-26-9-6-7(2-4-8(9)29-30(23,24)25)3-5-10(17)27-16-13(20)11(18)12(19)14(28-16)15(21)22/h2-6,11-14,16,18-20H,1H3,(H,21,22)(H,23,24,25)