| abstract |
Disclosed herein are compounds of formula (I) or (II), wherein R is phenyl or substituted phenyl; or R is furyl, pyridyl or quinolinyl; R1 and R2 are hydrogen, halogen, alkyl, alkoxy, nitro, carboxyl, alkoxycarbonyl or aryloxycarbonyl; R3 is hydrogen, alkyl, aryl or arylalkyl; R4 and R5 are hydrogen or alkyl; or a pharmaceutically acceptable salt thereof, which are useful as inhibitors of smooth muscle cell proliferation. |