N-benzoyl- and N-benzylpyrrolidin-3-ylamines as histamine-3 antagonists

A compound of formula I

• wherein
• X is CO, CH2 or SOm;
• Y is NR6, NR6CO, O or SOp;
• m and p are each individually 0 or an integer of 1 or 2;
• R1 and R2 are taken together with the atom to which they are attached to form an optionally substituted 4- to 7-membered ring optionally containing one or two additional heteroatoms selected from N, O or S
• R3 is an aryl group optionally substituted;
• R4 and R5 are each independently H, halogen, OR9 or an alkyl, alkenyl, alkynyl, cycloalkyl, cycloheteroalkyl, aryl or heteroaryl group each optionally substituted;
• and
• R6 and R9 are each independently H or an optionally substituted alkyl group;
• or
• a stereoisomer thereof or a pharmaceutically acceptable salt thereof.