Synthesis of amides of 7-methyl-3-phenyl-2,4-dioxo-1,2,3,4- tetrahydropyrido[2,3-d]pyrimidine-5-carboxylic acid (6-10) and their 1-[2-hydroxy-3(4-phenyl-1-piperazinyl)propyl] derivatives (11-15) are described. Some of them displayed strong analgesic activity.

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http://dx.doi.org/10.1016/s0014-827x(99)00101-9DOI Listing

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