2-methyl-3-acetyl-4-aryl-5-oxo-1,4-dihydro-5H indeno(1,2-b) pyridine derivatives studies and their calcium antagonistic activities.

Sixteen 2-methyl-3-acetyl-4-aryl-5-oxo-1,4-dihydro-5H-indeno(1,2-b)pyridine derivatives (3a-p) have been prepared. The structures of the compounds were characterised by IR, 1H-NMR, 13C-NMR, X-Ray and elemental analyses. The calcium antagonistic activity of these compounds were studied in rat taenia coli pre-contracted with 1 mmol/l Ca+2.