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