ERROR opening https://cactus.nci.nih.gov/chemical/structure/C1CN%28CCN1CCCCC2%3DCNC3%3DC2C%3DC%28C%3DC3%29C/file?format=sdf&get3d=True -- C1CN%28CCN1CCCCC2%3DCNC3%3DC2C%3DC%28C%3DC3%29C could not be loaded.