in the presence of cacl2 , ltd4 , lte4 and the srs-a antagonist fpl 55712 can inhibit 3h-ltc4 specific binding , being , however , less potent than ltc4 ( ic50 s = 2.2 x 10 ( -6 ) , 2.4 x 10 ( -5 ) m , for ltd4 , lte4 and fpl 55712 , respectively ) .
C0038091
srs-a
C0023542
ltc4