InChI=1S/C14H18O8S/c1-9(8-15)2-4-11-6-10(3-5-12(11)16)7-13(14(17)18)22-23(19,20)21/h2-3,5-6,13,15-16H,4,7-8H2,1H3,(H,17,18)(H,19,20,21)