ERROR opening https://cactus.nci.nih.gov/chemical/structure/O%3DC1OC2%3DCC3%3DC%28C%3DCO3%29C%3DC2C%3DC1/file?format=sdf&get3d=True  -- O%3DC1OC2%3DCC3%3DC%28C%3DCO3%29C%3DC2C%3DC1 could not be loaded.