ERROR opening https://cactus.nci.nih.gov/chemical/structure/CN1CCC%28CC1%29%28C2%3DCC%3DCC%3DC2%29OC3%3DCC%3DC%28C%3DC3%29N/file?format=sdf&get3d=True  -- CN1CCC%28CC1%29%28C2%3DCC%3DCC%3DC2%29OC3%3DCC%3DC%28C%3DC3%29N could not be loaded.