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