ERROR opening https://cactus.nci.nih.gov/chemical/structure/O%3DC%28C1CCC%28CN2C%28C%3DCC2%3DO%29%3DO%29CC1%29ON3C%28CCC3%3DO%29%3DO/file?format=sdf&get3d=True  -- O%3DC%28C1CCC%28CN2C%28C%3DCC2%3DO%29%3DO%29CC1%29ON3C%28CCC3%3DO%29%3DO could not be loaded.