ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC1%3DC%28C%3DCC%3DN1%29OC%5BC%40%40H%5D2CCCN2/file?format=sdf&get3d=True  -- CC1%3DC%28C%3DCC%3DN1%29OC%5BC%40%40H%5D2CCCN2 could not be loaded.