InChI=1S/C15H22O7S/c1-13(2)5-10-9(12(13)17)4-8(7-16)15(18)11(6-14(10,15)3)22-23(19,20)21/h4,7,9-12,17-18H,5-6H2,1-3H3,(H,19,20,21)