ERROR opening https://cactus.nci.nih.gov/chemical/structure/COC1%3DCC%28%3DC%28C%3DC1CCN%29OC%29SCC%28F%29F/file?format=sdf&get3d=True  -- COC1%3DCC%28%3DC%28C%3DC1CCN%29OC%29SCC%28F%29F could not be loaded.