SEARCH Articles Figures Tables 3 ,5 -cyclic guanosine monophosphate 3 ,5 -cGMP) Cyclic guanosine Cyclic guanosine 3 ,5 -monophosphate second messenger Guanosin Guanosin 5’-monophosphate Guanosine Guanosine 3 ,5 -cyclic monophosphate sodium Guanosine 3’,5’-cyclic monophosphate structure Guanosine monophosphate Monophosphates, cyclic