InChI=1S/C19H20ClNO8/c1-8-11(20)6-9(22)7-13(8)21-12-5-3-2-4-10(12)17(26)28-19-16(25)14(23)15(24)18(27)29-19/h2-7,14-16,18-19,21-25,27H,1H3