8- (2- (6- [Biotinyl]aminohexanoyl)aminoethylthio)guanosine- 3', 5'- cyclic monophosphate ( 8-Biotin-11-cGMP / 8-[Biotin]-AET-cGMP ), sodium salt
8- (3- Butynylthio)guanosine- 3', 5'- cyclic monophosphate ( 8-Bu(3-yne)T-cGMP ), sodium salt
8- Nitroguanosine- 3', 5'- cyclic monophosphate, sodium salt