ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC12C%3DC%28C%28%3DO%29C%3DC1C3%3DCC%28%3DCC%28%3DC3C%28%3DO%29O2%29O%29OC%29O/file?format=sdf&get3d=True -- CC12C%3DC%28C%28%3DO%29C%3DC1C3%3DCC%28%3DCC%28%3DC3C%28%3DO%29O2%29O%29OC%29O could not be loaded.