InChI=1S/C20H20ClNO8/c1-22(2)15-7-3-6-12(19(29)20(7,30)11(25)5-9(15)23)18(28)14-13(16(6)26)8(21)4-10(24)17(14)27/h4,6-7,15-16,24,26-27,29-30H,3,5H2,1-2H3/t6?,7?,15?,16?,20-/m1/s1