The present invention provides compounds having formula (I): 1 and pharmaceutically acceptable derivatives thereof, wherein R.sup.1, R.sup.2 and B are as described generally and in classes and subclasses herein, and additionally provides pharmaceutical compositions thereof, and methods for the use thereof for the treatment of any of a number of conditions or diseases in which HGF/SF or the activities thereof, or agonists or antagonists thereof have a therapeutically useful role.