ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC%28C%29%28C%29C1%3DCC%28%3DC%28C%3DC1%29OP%28%3DO%29%28NC%29OC%29Cl/file?format=sdf&get3d=True  -- CC%28C%29%28C%29C1%3DCC%28%3DC%28C%3DC1%29OP%28%3DO%29%28NC%29OC%29Cl could not be loaded.