ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCCCCCCCCCCCCCCCN%20%28C%29%28C%29CC1%3DCC%3DCC%3DC1.Cl-/file?format=sdf&get3d=True -- CCCCCCCCCCCCCCCCN%20%28C%29%28C%29CC1%3DCC%3DCC%3DC1.Cl- could not be loaded.