ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCCC%5CN%3DC%28/O%29%5Cn1c%28%5CN%3DC%28/O%29%5COC%29nc2ccccc12/file?format=sdf&get3d=True -- CCCC%5CN%3DC%28/O%29%5Cn1c%28%5CN%3DC%28/O%29%5COC%29nc2ccccc12 could not be loaded.