User: I have a question about the molecule with SMILES Nc1ncnc2c1ncn2CCOCP(=O)(O)O.
Assistant: That sounds interesting, how can I help?
User: How many heavy (non-hydrogen) atoms does this compound have?
Assistant: The answer is 18
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#}
Nc1ncnc2c1ncn2CCOCP(=O)(O)O
Nc1ncnc2c1ncn2CCOCP(=O)(O)O
9-[2-(phosphonomethoxy)ethyl]purin-6-amine
How many heavy (non-hydrogen) atoms does this compound have?
18