ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCCN1C%28%3DO%29C2%3DC%28N%3DCN2%29N%28C1%3DO%29C3%3DCC%3DC%28C%3DC3%29Cl/file?format=sdf&get3d=True  -- CCCN1C%28%3DO%29C2%3DC%28N%3DCN2%29N%28C1%3DO%29C3%3DCC%3DC%28C%3DC3%29Cl could not be loaded.