New derivatives, and their salts, of 1,4- and 4,10-dihydro-4-oxo-pyrimido[1,2-a]benzimidazole-3-carboxylic acids, esters and carboxamides have the general formulas ##STR1## They are useful as central nervous system depressants and anti-inflammatory agents.
1,4-和4,10-二氢-4-氧基
嘧啶并[1,2-a]
苯并咪唑-3-
羧酸,酯和羧酰胺的新衍
生物及其盐具有以下通式:##STR1## 它们可用作中枢神经系统
抑制剂和抗炎药。