ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC%28C%29CNC%28%3DO%29/C%3DC/C%3DC/CCCCCC/C%3DC/C1%3DCC2%3DC%28C%3DC1%29OCO2/file?format=sdf&get3d=True -- CC%28C%29CNC%28%3DO%29/C%3DC/C%3DC/CCCCCC/C%3DC/C1%3DCC2%3DC%28C%3DC1%29OCO2 could not be loaded.