ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC1C%28OC%28%3DN1%29N%29C2%3DCC%3DC%28C%3DC2%29Br/file?format=sdf&get3d=True -- CC1C%28OC%28%3DN1%29N%29C2%3DCC%3DC%28C%3DC2%29Br could not be loaded.