ERROR opening https://cactus.nci.nih.gov/chemical/structure/Clc1ccccc1C%28c2ccccc2%29%28c3ccccc3%29n4ccnc4/file?format=sdf&get3d=True  -- Clc1ccccc1C%28c2ccccc2%29%28c3ccccc3%29n4ccnc4 could not be loaded.