Guanosine- 2', 3'- cyclic monophosphorothioate, exo / Sp- isomer ( Sp-2',3'-cGMPS ), sodium salt
Inosine- 2', 3'- cyclic monophosphate ( 2',3'-cIMP ), sodium salt
2'- O- (N'- Methylanthraniloyl)uridine- 3', 5'- cyclic monophosphate, sodium salt ( MANT-cUMP )
8- Nitroguanosine- 3', 5'- cyclic monophosphate, sodium salt
8- Nitroxanthosine- 3', 5'- cyclic monophosphate ( 8-NO₂-cXMP ), sodium salt
N6- Phenyladenosine- 3', 5'- cyclic monophosphorothioate, Rp- isomer