major interest in this pathway did not occur until 5 years later when leukotriene b4 ( ltb4 ) was first described , and the slow-reacting substance of anaphylaxis ( srs-a ) was chemically defined as three additional leukotriene products of tis pathway : leukotriene c4 ( ltc4 ) , leukotriene d4 ( ltd4 ) and leukotriene e4 ( lte4 ) .
C0038091
slow-reacting substance of anaphylaxis
C0023545
leukotriene