Replacement of the isothiourea moiety of known histamine H-3 antagonis
ts by certain 5-membered heteroaromatic systems can give compounds wit
h an improved activity profile. One of these, chlorophenyl)methyl]-5-[
2-(1H-imidazol-4-yl)ethyl] 1,2,4-oxadiazole (GR175737) is a potent, se
lective, orally active and centally penetrating H-3 antagonist. Copyri
ght (C) 1996 Elsevier Science Ltd