ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC%28C%29%28C%29NCC%28COC1%3DC%28C%3DCC%28%3DC1%29Cl%29C2%3DCC%28%3DO%29CC2%29O/file?format=sdf&get3d=True -- CC%28C%29%28C%29NCC%28COC1%3DC%28C%3DCC%28%3DC1%29Cl%29C2%3DCC%28%3DO%29CC2%29O could not be loaded.