ERROR opening https://cactus.nci.nih.gov/chemical/structure/COC1%3DCC%3DC%28OC%3DC2CCN%28C%28C%29C%29C%28C%29C%29C2%3DC1/file?format=sdf&get3d=True  -- COC1%3DCC%3DC%28OC%3DC2CCN%28C%28C%29C%29C%28C%29C%29C2%3DC1 could not be loaded.