ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCN%28CC%29c1nc%28C%29cc%28OP%28%3DS%29%28OC%29OC%29n1/file?format=sdf&get3d=True  -- CCN%28CC%29c1nc%28C%29cc%28OP%28%3DS%29%28OC%29OC%29n1 could not be loaded.