fpl55712 , a putative antagonist of the sulfidopeptide lt components of slow reacting substance of anaphylaxis , had ki values of 1520 +/- 800 nm and 1180 +/- 720 nm for [ 3h ] ltc4 binding sites on membrane-enriched subcellular fractions i and iv , respectively .
C0038091
of
C0023542
ltc4