InChI=1S/C21H19ClO8/c1-7-9(5-12-21(3,4)30-12)10(23)6-11-17(7)29-20(27)13-8(2)15(22)16(24)14(19(25)26)18(13)28-11/h6,12,23-24H,5H2,1-4H3,(H,25,26)