InChI=1S/C20H20ClNO7/c1-22(2)16-8-5-7-13(19(28)20(8,29)12(25)6-11(16)24)18(27)15-10(23)4-3-9(21)14(15)17(7)26/h3-4,7-8,13,16-17,23,26,29H,5-6H2,1-2H3/t7?,8?,13?,16?,17?,20-/m1/s1