139157-01-0 1H-Pyrimido(5,4-a)pyrrolizin-4(5H)-one, 6,7-dihydro-9-benzoyl- 5,6-Trimethylene-7-benzoylpyrrolo(3,4-d)pyrimidin-4-one 6,7-Dihydro-9-benzoyl-1H-pyrimido(5,4-a)pyrrolizin-4(5H)-one BRN 5446798