ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC%23CCCN1C2%3DNC%3DC%28C%28%3DC2C%3DN1%29N%29C%28%3DO%29NCC%3DC/file?format=sdf&get3d=True  -- CC%23CCCN1C2%3DNC%3DC%28C%28%3DC2C%3DN1%29N%29C%28%3DO%29NCC%3DC could not be loaded.