ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCC1%3DNC2%3DC%28C%3DC1%29C%28%3DNC%28%3DO%29N2CC%29C3%3DCC%28%3DCC%3DC3%29Cl/file?format=sdf&get3d=True -- CCC1%3DNC2%3DC%28C%3DC1%29C%28%3DNC%28%3DO%29N2CC%29C3%3DCC%28%3DCC%3DC3%29Cl could not be loaded.