ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCN1C%3DNC%3DC1C2%3DCNC3%3DC2C%28%3DC%28C%3DC3%29I%29F/file?format=sdf&get3d=True -- CCN1C%3DNC%3DC1C2%3DCNC3%3DC2C%28%3DC%28C%3DC3%29I%29F could not be loaded.