title: Studies on histaminergic compounds, IV. Non-isosterism between the imidazole, guanidino and isothiourea moieties at the H2-receptor.
mesh_terms: D000818:Animals; D006146:Guanidines / Q000494:pharmacology*; D006168:Guinea Pigs; D007093:Imidazoles / Q000494:pharmacology*; D066298:In Vitro Techniques; D009131:Muscle, Smooth, Vascular / Q000187:drug effects; D011970:Receptors, Histamine H2 / Q000187:drug effects*; D013237:Stereoisomerism; D013890:Thiourea / Q000494:pharmacology*
chemical_list: D006146:Guanidines; D007093:Imidazoles; D011970:Receptors, Histamine H2; D013890:Thiourea