| abstract |
Compounds of formula. wherein A represents a vinylene or dimethylene residue, q is 0 or 1, R is an alkyl residue which may have an amino group, X represents -S- or -NH-, and R is a hydrogen atom or a residue of the formula. wherein Pure hydroxy or alkoxy, and R 1 is a hydrogen atom or an alkyl, cycloalkylalkyl or phenylalkyl radical each having not more than a total of 8 carbon atoms, or an unsubstituted or substituted alkylthioalkyl radical. The preparation of the compounds is described. have therapeutic activity, especially antihypertensive activity. |