ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCC%28%3DO%29N%5BC%40%40H%5D1CCCC2%3DC1C%3DNC%3DC2C3%3DCC4%3DC%28C%3DC3%29N%28C%28%3DO%29CC4%29C/file?format=sdf&get3d=True -- CCC%28%3DO%29N%5BC%40%40H%5D1CCCC2%3DC1C%3DNC%3DC2C3%3DCC4%3DC%28C%3DC3%29N%28C%28%3DO%29CC4%29C could not be loaded.