ERROR opening https://cactus.nci.nih.gov/chemical/structure/O%3DC2Nc1cccc%28OCC%28O%29CNC%28C%29%28C%29C%29c1CC2/file?format=sdf&get3d=True  -- O%3DC2Nc1cccc%28OCC%28O%29CNC%28C%29%28C%29C%29c1CC2 could not be loaded.