InChI=1S/C21H19ClO8/c1-8(2)5-11(24)15-10(7-23)18-20(17(26)19(15)28-4)30-21(27)14-9(3)16(22)12(25)6-13(14)29-18/h5-6,23,25-26H,7H2,1-4H3