ruthenium derivative article 14 complex formation 8 iron derivative 6 osmium derivative 6 synthesis 6 Animals 4 Mice 4 Ruthenium 4 chemical analysis 4 chemical reaction 4 chemical structure 4 controlled study 4 electrochemistry 4 electron 4 electron spin resonance 4 infrared spectroscopy 4 ligand 4 metal 4 nitric oxide 4 nonhuman 4 proton transport 4 pyrazine derivative 4 reduction 4 2,2' bipyridine 2 2,2'-Dipyridyl 2 Biogenic Amines 2 Caged compounds 2 Crystallography, X-Ray 2 Cyanide-bridged systems 2