Abstract: Compounds of the formula (I) or (II) and their pharmaceutically acceptable salts are ligands at gastrin and/or chole-cystokinin receptors n is from 1 to 4; R4 is C1 to C15 hydrocarbyl wherein up to two C atoms may optionally be replaced by N, O and/or S atoms and up to three H atoms may optionally be replaced by halogen atoms; Z is —(NR5)a—CO—(NR6)b-(wherein a is 0 or 1, b is 0 or 1, and R5 and R6 are independently selected from H, Me, Et, Pr, Bn), —CO—NR5—CH2—CO—NR6—, —CO—O—, —CH2—CH2—, —CH?CH—, CH2—NR6— or a bond; Q is R7V, or(a) wherein R7 is —CH2—; —CH2—; or(b) R7 and R6, together with the nitrogen atom to which R6 is attached, form a piperidine or pyrrolidine ring which is substituted by V; V is —CO—NH—SO2-Ph, —SO2—NH—CO-Ph, CH2OH, or a group of the formula —R8U, (wherein U is —COOH, tetrazolyl, —CONHOH— or —SO3H; and R8 is a bond; C1 to C6 hydrocarbylene, optionally substituted by hydroxy, amino or acetamino; —O—(C1 to C3 alkylene)-; —SO2NR9—CHR10—; —CO—NR9—CHR10—, R9 and R10 being independently se

Abstract: Compounds of formula (I) (and pharmaceutically acceptable salts thereof) are histamine H3 receptor ligands.

Abstract: 1

Abstract: Compounds of formula (I) and their pharmaceutically acceptable salts are ligands at gastrin and/or cholecystokinin receptors. X and Y are independently ═N—, —N(R5)—═CH—, —S— or —O—.

Abstract: A compound of the formula wherein R2 is an optionally substituted Cz to Cg alkylene or alkylene chain; R3 is C2 to C15 optionally substituted hydrocarbyl; X is a bond or —NR4—, wherein R4 is hydrogen or non-aromatic C1 to C5 optionally substituted hydrocarbyl, or aryl(C1 to C3)alkyl, or a pharmaceutically acceptable salt thereof.

Abstract: Compounds of the formula whereinone of U and V is --CHR.sup.2 --, and the other of U and V is selected from --N(COR.sup.4)--, --CH(COR.sup.4)--, --N(SO.sub.2 R.sup.4)-- and --CH(SO.sub.2 R.sup.4)--,and pharmaceutically acceptable salts thereof are ligands at gastrin and/or cholecystokinin receptors.