34014-01-2 8-Ethyl-5,8-dihydro-2-(3-hydroxy-1-pyrrolidinyl)-5-oxopyrido(2,3-d)pyrimidine-6-carboxylic acid AT 616 BRN 0700176 Pyrido(2,3-d)pyrimidine-6-carboxylic acid, 5,8-dihydro-8-ethyl-2-(3-hydroxy-1-pyrrolidinyl)-5-oxo- beta-Hydroxypiromidic acid