ERROR opening https://cactus.nci.nih.gov/chemical/structure/C1CCC%28C1%29OC2%3DCC%3DC%28C%3DC2%29C3%3DNOC%28%3DN3%29C4%3DCC%3DC%28C%3DC4%29O/file?format=sdf&get3d=True  -- C1CCC%28C1%29OC2%3DCC%3DC%28C%3DC2%29C3%3DNOC%28%3DN3%29C4%3DCC%3DC%28C%3DC4%29O could not be loaded.