| abstract |
The present invention relates to compounds of the general formula wherein R1 is optionally substituted aryl, arylalkyl, arylalkylsulfonyl, aryloxyalkyl; R 2 is hydrogen, alkyl, cycloalkyl, haloalkyl, aryl, heteroaryl, arylalkyl, arylalkoxy, heteroarylalkyl, heteroaryloxyalkyl, or other alkyl groups having various substituents. ; and B1, and their salts, their use, and pharmaceutical compositions containing them. HE |