| abstract |
The present invention relates to compounds of formula I: wherein R1 is hydroxy, methoxy, mercapto, hydrazino, substituted hydrazino, chloro, amino, alkylamino, dialkylamino, hydroxyalkylamino, aralkylamino or substituted aralkylamino and R2 is phenylalkyl having 1 to 3 carbon atoms in the alkyl moiety and at least two alkoxy, alkyl, halogen, hydroxy, nitro, amino, substituted amino, aminomethyl, acylamino, carboxy, carboxyalkyl or hydroxymethyl groups in the benzene ring or naphthylalkyl, tetrahydronaphthylalkyl, quinolylalkyl, tetrahydroquinolylalkyl or isoquinolylalkyl, each having 1 to 3 carbon atoms in the alkyl moiety and pharmaceutically acceptable acid addition salts thereof. These compounds are useful as antianginal or bronchial dilator agents. |