InChI=1S/C14H18O8S/c1-8(2)3-4-10-5-9(6-11(15)13(10)16)7-12(14(17)18)22-23(19,20)21/h3,5-6,12,15-16H,4,7H2,1-2H3,(H,17,18)(H,19,20,21)