User: I have a question about the chemical with SMILES O[C@@H]([C@H](O)[C@H](O)CBr)[C@H](O)CBr.
Assistant: 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 4
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[C@@H]([C@H](O)[C@H](O)CBr)[C@H](O)CBr
O[C@@H]([C@H](O)[C@H](O)CBr)[C@H](O)CBr
(2S,3S,4S,5S)-1,6-dibromohexane-2,3,4,5-tetrol
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