ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC1%3DCC%28%3DC%28C2%3DC1C%3DCC%3DN2%29O%29Br/file?format=sdf&get3d=True  -- CC1%3DCC%28%3DC%28C2%3DC1C%3DCC%3DN2%29O%29Br could not be loaded.