ERROR opening https://cactus.nci.nih.gov/chemical/structure/CN1CCC%28CC1%29OC%28%3DO%29C%28C2%3DCC%3DCC%3DC2%29%28C3%3DCC%3DCC%3DC3%29O/file?format=sdf&get3d=True  -- CN1CCC%28CC1%29OC%28%3DO%29C%28C2%3DCC%3DCC%3DC2%29%28C3%3DCC%3DCC%3DC3%29O could not be loaded.