InChI=1S/C19H20ClNO7/c1-9-11(20)6-4-8-12(9)21-13-7-3-2-5-10(13)17(25)27-19-16(24)14(22)15(23)18(26)28-19/h2-8,14-16,18-19,21-24,26H,1H3