Synonyms: 1H-Pyrrolo(2,3-d)pyrimidine-5-carbonitrile, 2-amino-7-(2,4-dihydroxybutyl)-4,7-dihydro-4-oxo-, (S)-;1H-Pyrrolo[2,3-d]pyrimidine-5-carbonitrile, 2-amino-7-(2,4-dihydroxybutyl)-4,7-dihydro-4-oxo-, (S)-;2-Amino-5-cyano-7-((S)-2,4-dihydroxybutyl)pyrrolo(2,3-d)pyrimidin-4-one;2-Amino-5-cyano-7-[(S)-2,4-dihydroxybutyl]pyrrolo[2,3-d]pyrimidin-4-one