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Synthesis of alpha-[7-methyl-9-methoxy-5-oxo-furo-[3,2-g] [1]-benzopyranoxy-4]-butyric and valeric acids and their aminoesters.

In the reaction of 4-desmethylkhelline with ethyl alpha-bromobutyrate or alpha-bromovalerate we obtained alpha-[7-methyl-9-methoxy-5-oxo-furo[3,2-g] [1] benzopyranoxy-4]-butyric 2 and valeric 3 acids and later their dialkylaminoethylesters as hydrochlorides (2b--2, 3b--3e). Compounds 2c, 2e, 2f (Table 1) and 3e (Table 2) show a weak hypotensic activity. Moreover compound 2f possesses an antriarrhythmic activity.

Aminobutyrates↗