ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C12H8Cl6/c13-8-9(14)11(16)7-5-2-1-4(3-5)6(7)10(8,15)12(11,17)18/h1-2,4-7H,3H2/t4?,5?,6-,7+,10+,11-/file?format=sdf&get3d=True  -- InChI=1S/C12H8Cl6/c13-8-9(14)11(16)7-5-2-1-4(3-5)6(7)10(8,15)12(11,17)18/h1-2,4-7H,3H2/t4?,5?,6-,7+,10+,11- could not be loaded.