ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCOCN1C%28%3DC%28C%28%3DO%29NC1%3DO%29C%28C%29C%29CC2%3DCC%3DCC%3DC2/file?format=sdf&get3d=True -- CCOCN1C%28%3DC%28C%28%3DO%29NC1%3DO%29C%28C%29C%29CC2%3DCC%3DCC%3DC2 could not be loaded.