InChI=1S/C11H14Cl2N2O5S/c12-10(13)11(18)15-8(5-16)9(17)6-1-3-7(4-2-6)21(14,19)20/h1-4,8-10,16-17H,5H2,(H,15,18)(H2,14,19,20)/t8-,9-/m1/s1