ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCC1CN%28CCC1%28C2%3DCC%3DCC%3DC2%29OC%28%3DO%29CC%29C/file?format=sdf&get3d=True -- CCC1CN%28CCC1%28C2%3DCC%3DCC%3DC2%29OC%28%3DO%29CC%29C could not be loaded.