ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCCN1CCC%28%3DCC1%29C2%3DCNC3%3DC2C%3DC%28C%3DC3%29Cl/file?format=sdf&get3d=True  -- CCCN1CCC%28%3DCC1%29C2%3DCNC3%3DC2C%3DC%28C%3DC3%29Cl could not be loaded.