ERROR opening https://cactus.nci.nih.gov/chemical/structure/CN1C%3DNC2%3DC1C%3DCN%3DC2OCC3%3DCC%3DCC%3DC3Cl/file?format=sdf&get3d=True  -- CN1C%3DNC2%3DC1C%3DCN%3DC2OCC3%3DCC%3DCC%3DC3Cl could not be loaded.