title: [Cyclic nucleotides].
mesh_terms: D000818:Animals; D001980:Bronchi / Q000187:drug effects / Q000502:physiology*; D005576:Colforsin / Q000494:pharmacology; D000242:Cyclic AMP / Q000502:physiology*; D006152:Cyclic GMP / Q000502:physiology*; D006168:Guinea Pigs; D066298:In Vitro Techniques; D008297:Male; D009119:Muscle Contraction / Q000187:drug effects; D009574:Nitro Compounds / Q000494:pharmacology
chemical_list: D009574:Nitro Compounds; D005576:Colforsin; D000242:Cyclic AMP; D006152:Cyclic GMP