1,10-Fenanthrolin [Czech] 1,10-Phenanthroline 1,10-o-Phenanthroline 16561-55-0 2-Phenanthroline 21532-74-1 22802-96-6 3829-86-5 4,5-Diazaphenanthrene 66-71-7 CCRIS 4855 EINECS 200-629-2 NSC 203545 NSC 4265 O-PHENANTHROLINE Orthophenanthroline beta-Phenanthroline