There are provided novel compounds of formula (I), wherein R1, R2,
X, Y, V, W and Z are as defined in the specification, and pharmaceutically acceptable
salts thereof, and enantiomers and racemates thereof; together with processes for
their preparation, compositions containing them and their use in therapy. The compounds
are inhibitors of nitric oxide synthase and are thereby particularly useful in
the treatment or prophylaxis of inflammatory disease and pain.
##STR1##
