ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC1%3DCC2%3DNC3%3DC%28C%3DC%28C%3DC3%29N%28C%29C%29N%3DC2C%3DC1N.Cl/file?format=sdf&get3d=True  -- CC1%3DCC2%3DNC3%3DC%28C%3DC%28C%3DC3%29N%28C%29C%29N%3DC2C%3DC1N.Cl could not be loaded.