InChI=1S/C20H21ClN2O8/c1-23-13-6-4-5-9(15(26)11-8(24)3-2-7(21)10(11)14(5)25)17(28)20(6,31)18(29)12(16(13)27)19(22)30/h2-3,5-6,12-14,16,23-25,27-28,31H,4H2,1H3,(H2,22,30)/t5?,6?,12?,13?,14?,16?,20-/m0/s1