ERROR opening https://cactus.nci.nih.gov/chemical/structure/COC1%3DC%28C2%3DC%28C%3DC1%29NC%3DC2CCN3CCCC3%29F/file?format=sdf&get3d=True  -- COC1%3DC%28C2%3DC%28C%3DC1%29NC%3DC2CCN3CCCC3%29F could not be loaded.