7-{[(2R,3S)-3-Hydroxy-2-(hydroxymethyl)pyrrolidin-1-yl]methyl}-1,5-dihydro-4H-pyrrolo[3,2-d]pyrimidin-4-one

7-{[(2R,3S)-3-Hydroxy-2-(hydroxymethyl)pyrrolidin-1-yl]methyl}-1,5-dihydro-4H-pyrrolo[3,2-d]pyrimidin-4-one