in order to investigate this association in the guinea pig trachea , we used cyclic gmp derivatives , guanylate cyclase activators ( n-methylhydroxylamine ( nmh ) and nitroglycerin ( ng ) ] and inhibitors [ oxyhemoglobin ( hbo2 ) and methylene blue ( mb ) ] .
C3500480
guanylate cyclase activators
C0017887
nitroglycerin