ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCCC1%3DC%28C2%3DC%28C%3DC1O%29OC3%3DCC%28%3DCN3C2%3DO%29Cl%29O/file?format=sdf&get3d=True  -- CCCC1%3DC%28C2%3DC%28C%3DC1O%29OC3%3DCC%28%3DCN3C2%3DO%29Cl%29O could not be loaded.