ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC1%3DC%28/C%3DC2C%28C%29%3DC%28C%3DC%29C%28N/2%29%3DO%29NC%28CC3%3DC%28CCC%28O%29%3DO%29C%28C%29%3DC%28/C%3DC4C%28C%3DC%29%3DC%28C%29C%28N/4%29%3DO%29N3%29%3DC1CCC%28O%29%3DO%0A%20%20%20%20Cc1c%28c%28%5BnH%5Dc1/C%3DC%5C2/C%28%3DC%28C%28%3DO%29N2%29C%3DC%29C%29Cc3c%28c%28c%28%5BnH%5D3%29/C%3DC%5C4/C%28%3DC%28C%28%3DO%29N4%29C%29C%3DC%29C%29CCC%28%3DO%29O%29CCC%28%3DO%29O/file?format=sdf&get3d=True -- CC1%3DC%28/C%3DC2C%28C%29%3DC%28C%3DC%29C%28N/2%29%3DO%29NC%28CC3%3DC%28CCC%28O%29%3DO%29C%28C%29%3DC%28/C%3DC4C%28C%3DC%29%3DC%28C%29C%28N/4%29%3DO%29N3%29%3DC1CCC%28O%29%3DO%0A%20%20%20%20Cc1c%28c%28%5BnH%5Dc1/C%3DC%5C2/C%28%3DC%28C%28%3DO%29N2%29C%3DC%29C%29Cc3c%28c%28c%28%5BnH%5D3%29/C%3DC%5C4/C%28%3DC%28C%28%3DO%29N4%29C%29C%3DC%29C%29CCC%28%3DO%29O%29CCC%28%3DO%29O could not be loaded.