Synthesis and Biological Activities of Metabolites of Mosapride, a New Gastroprokinetic Agent.

Abstract
In order to confirm the proposed structures of two metabolites 3 and 4 of the gastroprokinetic agent mosapride [4-amino-5-chloro-2-ethoxy-N-([4-(4-fluorobenzyl)-2-morpholinyl] methyl)benzamide, 2], the compounds were synthesized and their biological activity was examined. The structures of the metabolites were confirmed by means of comparison with the synthetic compounds. The serotonin 5-HT4 receptor agonistic activities of the metabolites were found to be less than that of mosapride.

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