ERROR opening https://cactus.nci.nih.gov/chemical/structure/O%3DC%28N1CC%28C%3DCC%3DN2%29%3DC2C1%29C3%3DCC%28C%23CC4%3DCC%3DCC%3DN4%29%3DC%28OC%28F%29F%29C%3DC3/file?format=sdf&get3d=True  -- O%3DC%28N1CC%28C%3DCC%3DN2%29%3DC2C1%29C3%3DCC%28C%23CC4%3DCC%3DCC%3DN4%29%3DC%28OC%28F%29F%29C%3DC3 could not be loaded.