ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C13H6Cl2N2O3/c14-11-4-8-7-2-1-6(17(19)20)3-9(7)13(16-18)10(8)5-12(11)15/h1-5,18H/b16-13-/file?format=sdf&get3d=True  -- InChI=1S/C13H6Cl2N2O3/c14-11-4-8-7-2-1-6(17(19)20)3-9(7)13(16-18)10(8)5-12(11)15/h1-5,18H/b16-13- could not be loaded.