ERROR opening https://cactus.nci.nih.gov/chemical/structure/O%3DC%28OCCOCCN%28C%29C%29N1c3c%28Sc2c1cccc2%29cccc3/file?format=sdf&get3d=True  -- O%3DC%28OCCOCCN%28C%29C%29N1c3c%28Sc2c1cccc2%29cccc3 could not be loaded.