2 3 4 6 7 8 hexahydropyrrolo 1 2 a pyrimidine July 8, 2019 16 32 64 128 1 3 4 6 7 8-hexahydro-2h-pyrimido 1 2-a pyrimidine 2 5-dihydropyrrolo 3 4-c pyrrole-1 4-dione 1h-pyrrolo 2 3-b pyridine
