You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
bicyclo[2.2.1]hept-5-ene-2-carboxylic acid;4-ethenylbenzoic acid;4-ethynylphenol;prop-2-enoic acid;prop-2-ynoic acid The above is the IUPAC name of a molecule. Write its molecular formula.
user
C31H30O9
assistant