ERROR opening https://cactus.nci.nih.gov/chemical/structure/C%5BC%40%5D1%28CC%28C2%3DC%28C1%29C%28%3DO%29C3%3DCC%28%3DCC%28%3DC3C2%3DO%29O%29OC%29O%29O/file?format=sdf&get3d=True -- C%5BC%40%5D1%28CC%28C2%3DC%28C1%29C%28%3DO%29C3%3DCC%28%3DCC%28%3DC3C2%3DO%29O%29OC%29O%29O could not be loaded.