ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCCN1CCC%5BC%40H%5D2%5BC%40H%5D1CC3%3DCN%3DC%28N%3DC3C2%29N/file?format=sdf&get3d=True -- CCCN1CCC%5BC%40H%5D2%5BC%40H%5D1CC3%3DCN%3DC%28N%3DC3C2%29N could not be loaded.