InChI=1S/C21H21ClO9S/c1-9(2)5-6-12-10(3)19-15(7-14(12)23)30-20-13(8-29-32(26,27)28)18(24)17(22)11(4)16(20)21(25)31-19/h5,7,23-24H,6,8H2,1-4H3,(H,26,27,28)