ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC1%3DCC%28%3DCC%3DC1%29N2CCN%28CC2%29CCC3%3DNC4%3DCC%3DCC%3DC4C%3DC3/file?format=sdf&get3d=True  -- CC1%3DCC%28%3DCC%3DC1%29N2CCN%28CC2%29CCC3%3DNC4%3DCC%3DCC%3DC4C%3DC3 could not be loaded.