our results show that ( a ) the responsiveness to sin-1 is not modified in nitrate-tolerant strips of human coronary arteries , ( b ) prolonged exposure of human coronary arteries to sin-1 does not cause tolerance , and ( c ) endothelium-dependent relaxations are not influenced by exposure of human coronary arteries to either glyceryl trinitrate or sin-1 .
C0028125
nitrate
C0017887
glyceryl trinitrate