ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCC%28C%29N%28C%28C%29CC%29CC%28O%29C1%3DCC%3DCN1CC2%3DCC%3DCC%3DC2Cl/file?format=sdf&get3d=True  -- CCC%28C%29N%28C%28C%29CC%29CC%28O%29C1%3DCC%3DCN1CC2%3DCC%3DCC%3DC2Cl could not be loaded.