You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-ethoxy-4-[hydroxy-[4-[(E)-(4-methyl-3-oxo-2-bicyclo[2.2.0]hexanylidene)methyl]phenyl]methyl]-2-methyl-1,3-dioxan-5-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H26O6
assistant