ERROR opening https://cactus.nci.nih.gov/chemical/structure/CN1C%28%3DO%29C%3DC2C%28%3DC1C3%3DCC%28%3DCC%3DC3%29N%28C%29C%29C%28%3DO%29N%28N2%29C4%3DCC%3DCC%3DC4Cl/file?format=sdf&get3d=True -- CN1C%28%3DO%29C%3DC2C%28%3DC1C3%3DCC%28%3DCC%3DC3%29N%28C%29C%29C%28%3DO%29N%28N2%29C4%3DCC%3DCC%3DC4Cl could not be loaded.