Task: Please answer the following question about the molecule with SMILES C[C@H](Cn1cnc2c(N)ncnc21)OCP(=O)(O)O.
Question: How many hydrogen bond donors are there in this compound, calculated according to Lipinski's original rules (i.e., counting NH and OH groups)?
Result: 4
Task: Please answer the following question about the molecule with {SMILES__description} {SMILES#}.
{#Description|Question|Request!}: {quest#}
{#Result|Answer|Completion!}: {answ#}
C[C@H](Cn1cnc2c(N)ncnc21)OCP(=O)(O)O
C[C@H](Cn1cnc2c(N)ncnc21)OCP(=O)(O)O
[(2R)-1-(6-aminopurin-9-yl)propan-2-yl]oxymethylphosphonicacid
How many hydrogen bond donors are there in this compound, calculated according to Lipinski's original rules (i.e., counting NH and OH groups)?
4