ERROR opening https://cactus.nci.nih.gov/chemical/structure/C1CN%28C%28%3DN1%29N%5BN%20%5D%28%3DO%29%5BO-%5D%29CC2%3DCN%3DC%28C%3DC2%29Cl/file?format=sdf&get3d=True  -- C1CN%28C%28%3DN1%29N%5BN%20%5D%28%3DO%29%5BO-%5D%29CC2%3DCN%3DC%28C%3DC2%29Cl could not be loaded.