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