InChI=1S/C19H18ClNO8/c20-11-5-3-7-13(10(11)8-22)21-12-6-2-1-4-9(12)17(26)28-19-16(25)14(23)15(24)18(27)29-19/h1-8,14-16,18-19,21,23-25,27H