- 5-Carboxamido-tryptamine, CP-122,288 and dihydroergotamine but not sumatriptan, CP-93,129, and serotonin-5-O-carboxymethyl-glycyl -tyrosinamide block dural plasma protein extravasation in knockout mice that lack 5-hydroxytryptamine1B receptors. Yu, X.J., Waeber, C., Castanon, N., Scearce, K., Hen, R., Macor, J.E., Chauveau, J., Moskowitz, M.A., Chaveau, J. Mol. Pharmacol. (1996)