InChI=1S/C11H13Cl2NO9/c12-9(13)11(1-2(15)14-10(11)21)23-8-5(18)3(16)4(17)6(22-8)7(19)20/h3-6,8-9,16-18H,1H2,(H,19,20)(H,14,15,21)