You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
7-hydroxy-2-(4-hydroxy-3,5-dimethylphenyl)-8-(3-methylbut-2-enyl)-2,3-dihydrochromen-4-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H24O4
assistant