Task: Answer the following question about the molecule with SMILES O=c1[nH]cnc2c(CN3C[C@H](CO)[C@@H](O)C3)c[nH]c12.
Request: How many hydrogen bond donors are there in this compound, calculated according to Lipinski's original rules (i.e., counting NH and OH groups)?
Completion: 4
Task: Answer the following question about the molecule with {SMILES__description} {SMILES#}.
{#Description|Question|Request!}: {quest#}
{#Result|Answer|Completion!}: {answ#}
O=c1[nH]cnc2c(CN3C[C@H](CO)[C@@H](O)C3)c[nH]c12
O=c1[nH]cnc2c(CN3C[C@H](CO)[C@@H](O)C3)c[nH]c12
7-[[(3R,4R)-3-hydroxy-4-(hydroxymethyl)pyrrolidin-1-yl]methyl]-3,5-dihydropyrrolo[3,2-d]pyrimidin-4-one
How many hydrogen bond donors are there in this compound, calculated according to Lipinski's original rules (i.e., counting NH and OH groups)?