InChI=1S/C21H22ClNO7/c1-20(29)8-6-9-17(23(2)3)12(25)7-13(26)21(9,30)19(28)14(8)18(27)15-11(24)5-4-10(22)16(15)20/h4-5,8-9,14,17,24,29-30H,6-7H2,1-3H3/t8?,9?,14?,17?,20-,21+/m0/s1