title: cAMP-phosphodiesterase inhibitors and tracheal smooth muscle relaxation.
mesh_terms: D015105:3',5'-Cyclic-AMP Phosphodiesterases / Q000037:antagonists & inhibitors*; D000403:Airway Resistance / Q000187:drug effects*; D000818:Animals; D006168:Guinea Pigs; D066298:In Vitro Techniques; D007700:Kinetics; D009126:Muscle Relaxation / Q000187:drug effects; D009130:Muscle, Smooth / Q000187:drug effects
chemical_list: D015105:3',5'-Cyclic-AMP Phosphodiesterases