InChI=1S/C15H18O8S/c1-8(16)3-12(23-24(19,20)21)6-10-5-11(17)7-14-15(10)13(18)4-9(2)22-14/h4-5,7-8,12,16-17H,3,6H2,1-2H3,(H,19,20,21)