among the synthetic glycolipids employed , propyl-2-deoxy-2- [ ( 3r ) -3-hydroxytetrade-canamido ] -4-o-pho sph ono-6-o-tetradecanoyl-beta-d-glucopyranoside ( glycolipid m9 ) induced il 1 secretion more efficiently than lipid a and lps , whereas the amounts of intracellular il 1 produced upon induction by these three substances were comparable .
C0023767
lipid a
C0023810
lps