2-{4-[2-(4-Acetylamino-benzenesulfonyl)-ethyl]-piperazin-1-yl}-8-ethyl-5-oxo-5,8-dihydro-pyrido[2,3-d]pyrimidine-6-carboxylic acid ethyl ester

acide ethyl-8 oxo-5 -2 dihydro-5,8 pyrido <2,3-d> pyrimidine-6 carboxylique

acide <(p. acetylaminophenylsulfonyl-2 ethyl)-4 piperazinyl-1>-2 ethyl-8 oxo-5 dihydro-5,8 pyrido <2,3-d> pyrimidine-6 carboxylique

acide <(phenyl-4 oxo-4 butyl)-4 piperazinyl-1>-2 ethyl-8 oxo-5 dihydro-5,8 pyrido <2,3-d> pyrimidine-6 carboxylique

acide ethyl-8 oxo-5 <(phenylsulfonyl-2 ethyl)-4 piperazinyl-1>-2 dihydro-5,8 pyrido <2,3-d> pyrimidine-6 carboxylique