User: I have a question about the chemical with SMILES O=c1[nH]cnc2c1ncn2[C@H]1CC[C@@H](CO)O1.
Assistant: That sounds interesting, how can I help?
User: How many hydrogen bond donors are there in this compound, calculated according to Lipinski's original rules (i.e., counting NH and OH groups)?
Assistant: The answer is 2
User: I have a question about the {#molecule|chemical|compound!} with {SMILES__description} {SMILES#}.
Assistant: {#Sure, what is your question?|How can I help?|That sounds interesting, how can I help?|Interesting, how can I help?!}
User: {quest#}
Assistant: {#The answer is |!}{answ#}
O=c1[nH]cnc2c1ncn2[C@H]1CC[C@@H](CO)O1
O=c1[nH]cnc2c1ncn2[C@H]1CC[C@@H](CO)O1
9-[(2R,5S)-5-(hydroxymethyl)oxolan-2-yl]-1H-purin-6-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)?