Task: Answer the following question about the molecule with SMILES CCCCCCCCC=CCCCCCCC(O)C(=O)O.
Request: What is the molecular formula of this compound, including any salt that it may have?
Completion: C18H34O3
Task: 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
What is the molecular formula of this compound, including any salt that it may have?