ERROR opening https://cactus.nci.nih.gov/chemical/structure/COC1%3DC2C%28%3DCC%28%3DC1C%3DO%29O%29C%28%3DO%29C3%3DCC%3DCC%3DC3C2%3DO/file?format=sdf&get3d=True -- COC1%3DC2C%28%3DCC%28%3DC1C%3DO%29O%29C%28%3DO%29C3%3DCC%3DCC%3DC3C2%3DO could not be loaded.