N2- (6- Aminohexyl)guanosine- 3', 5'- cyclic monophosphate ( 2-AH-cGMP )
β- (4- Azidophenyl)- 1, N²- etheno- 8- (2- (6- [biotinyl]aminohexanoyl)aminoethylthio)guanosine- 3', 5'- cyclic monophosphate ( 4-N₃-PET-8-Biotin-11-cGMP / 4-N₃-PET-8-[Biotin]-AET-cGMP ), sodium salt