InChI=1S/C21H21ClO8/c1-8-14-12(6-10(23)15(8)22)29-17-9(2)13(11(24)7-21(3,4)27)18(28-5)16(25)19(17)30-20(14)26/h6,23,25,27H,7H2,1-5H3