A compound of the formula (I): R.sup.1--NH--X--Y-Z (I) wherein each symbol
is as defined in the specification, or a pharmaceutically acceptable salt
thereof useful as a vascular adhesion protein-1 (VAP-1) inhibitor, a
pharmaceutical composition, a method for preventing or treating a VAP-1
associated disease, especially macular edema, which method includes
administering an effective amount of the compound or a pharmaceutically
acceptable salt thereof to a mammal, and the like.