| abstract |
The use of compounds of the formula: <IMAGE> I where R1 is alkyl, trifluoromethyl or pyridinyl; R2 is H, alkyl or substituted arylalkyl, in which the substituents are one or two halogens, carboxyl or alkoxycarbonyl groups; R3 and R4 are H, alkyl, halogen or nitro; or a pharmaceutically acceptable salt thereof, as inhibitors of smooth muscle cell proliferation. |