ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCOc3ccc%28Cc2nc1cc%28C%29ccc1n2CCN%28CC%29CC%29cc3/file?format=sdf&get3d=True -- CCOc3ccc%28Cc2nc1cc%28C%29ccc1n2CCN%28CC%29CC%29cc3 could not be loaded.