Task: Please answer the following question about the molecule with SMILES CCCCCCCCC=CCCCCCCC(O)C(=O)O.
Request: How many hydrogen bond donors does this compound have?
Completion: 2
Task: Please answer the following question about the molecule with {SMILES__description} {SMILES#}.
{#Description|Question|Request!}: {quest#}
{#Result|Answer|Completion!}: {answ#}
CCCCCCCCC=CCCCCCCC(O)C(=O)O
CCCCCCCCC=CCCCCCCC(O)C(=O)O
2-hydroxyoctadec-9-enoicacid
How many hydrogen bond donors does this compound have?