c1c(c2c([nH]1)c(=O)[nH]cn2)CN3C[C@H]([C@@H](C3)O)CO DIH_301_3BGS 7-[[(3S,4S)-3-hydroxy-4-(hydroxymethyl)pyrrolidin-1-yl]methyl]-3,5-dihydropyrrolo[3,2-d]pyrimidin-4-one c1c(c2c([nH]1)c(=O)[nH]cn2)CN3C[C@H]([C@@H](C3)O)CO DIH_301_3BGS 7-[[(3S,4S)-3-hydroxy-4-(hydroxymethyl)pyrrolidin-1-yl]methyl]-3,5-dihydropyrrolo[3,2-d]pyrimidin-4-one