ERROR opening https://cactus.nci.nih.gov/chemical/structure/COCCN1CCN%28CC1%29CC2CCN%28C2%3DO%29C3%3DCC%3DC%28C%3DC3%29Cl/file?format=sdf&get3d=True  -- COCCN1CCN%28CC1%29CC2CCN%28C2%3DO%29C3%3DCC%3DC%28C%3DC3%29Cl could not be loaded.