in isolated guinea-pig ileum , ym-16638 antagonized the contractions induced by slow reacting substance of anaphylaxis ( srs-a ) and leukotriene d4 ( ltd4 ) with ic50 values of 6.0 x 10 ( -8 ) and 1.1 x 10 ( -7 ) mol/l , respectively .
C0038091
slow reacting substance of anaphylaxis
C0023544
leukotriene d4