ERROR opening https://cactus.nci.nih.gov/chemical/structure/Cl.O%3DS%28%3DO%29%28N%3DN%20%3DN-%29n1ccnc1/file?format=sdf&get3d=True  -- Cl.O%3DS%28%3DO%29%28N%3DN%20%3DN-%29n1ccnc1 could not be loaded.