The present invention provides a potent PAF antagonist and antihistamine, 8-chloro-11- [1-[(5-methyl-3-pyridyl) methyl] -4-piperidylidene] -6,11-dihydro-5H-benzo [5,6] cyclohepta [1,2-b] pyridine. The present invention also relates to methods of preparation thereof, pharmaceutical compositions containing the compounds and their use for the preparation of medicaments useful for the treatment of diseases involving PAF and / or histamine.
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