ERROR opening https://cactus.nci.nih.gov/chemical/structure/FC1%3DC%28C%3DCC%3DC1%29C%28CC2%3DCC%3DCC%3DC2%29N3CCCC3/file?format=sdf&get3d=True -- FC1%3DC%28C%3DCC%3DC1%29C%28CC2%3DCC%3DCC%3DC2%29N3CCCC3 could not be loaded.