ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCCN1CCC%5BC%40H%5D2%5BC%40H%5D1CC3%3DC%28C2%29NN%3DC3/file?format=sdf&get3d=True  -- CCCN1CCC%5BC%40H%5D2%5BC%40H%5D1CC3%3DC%28C2%29NN%3DC3 could not be loaded.