Abstract: Basic esters of 1,4-dihydropyridine-3,5-dicarboxylic acid of formula (I) ##STR1## are described, in which R.sup.1 is a linear or branched alkyl radical containing 1-5 carbon atoms which is unsubstituted or substituted by an alkoxy group; R.sup.2 is phenyl or a nitro phenyl radical; R.sup.3 is phenyl, phenyl substituted by one to three radicals selected from (C.sub.1-4)alkyl, (C.sub.1-4)alkoxy, fluoro, chloro, bromo, nitro, cyano, COOR in which R is alkyl of 1 to 4, trifluo carbon atoms, romethyl, hydroxy, amino, mono- or di-alkylamino, mono- or di-acylamino, mercapto, S(O).sub.n -alkyl with n=0, 1 or 2, (C.sub.1-5)acyl, carbamoyl, ureido or R.sup.

Abstract: Compounds of formula I: ##STR1## are described in which R.sup.1 is a linear or branched alkyl radical containing between 1 and 5 carbon atoms, the alkyl radical being unsubstituted or substituted by an alkoxy group; R.sup.2 is an unsubstituted phenyl of phenyl substituted by a nitro group; R.sup.3 is hydrogen or a linear or branched alkyl residue containing between 1 and 4 carbon atoms, the alkyl radical being unsubstituted or substituted by at least one alkoxy or fluorine atom or both alkoxy and fluorine atoms; R.sup.4 is hydrogen or a linear or branched alkyl containing between 1 and 4 carbon atoms, the alkyl radical being unsubstituted or substituted by alkoxy, carbalkoxy, dialkylamino, 1-aryl or 1-heteroarylpiperazinyl, aryl or a monocyclic 5 or 6 membered heterocycle in which at least one of the heteroatoms is N,O,S such as 1-piperidinyl, 4-morpholinyl or R.sub.4 is alkenyl or cyclo(C.sub.3 -C.sub.