You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
ethyl (5Z)-5-(hydroxymethylidene)-6,6-dimethyl-4-oxo-3-(trifluoromethyl)-7H-1-benzofuran-2-carboxylate is the IUPAC name of a molecule. Please give its molecular formula.
user
C15H15F3O5
assistant