ERROR opening https://cactus.nci.nih.gov/chemical/structure/CN1C%28%3DO%29COc2c1cc%28Cl%29cc2C%28%3DO%29NC3CN4CCC3CC4/file?format=sdf&get3d=True -- CN1C%28%3DO%29COc2c1cc%28Cl%29cc2C%28%3DO%29NC3CN4CCC3CC4 could not be loaded.