ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC1%3DCN%3DC2C%28%3DC1%29C%3DCC%28%3DC2C%28%3DO%29O%29Cl/file?format=sdf&get3d=True -- CC1%3DCN%3DC2C%28%3DC1%29C%3DCC%28%3DC2C%28%3DO%29O%29Cl could not be loaded.