You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
5-[(3-ethoxy-4-hydroxyphenyl)methylidene]-1-ethyl-2-sulfanylidene-1,3-diazinane-4,6-dione The above is the IUPAC name of a molecule. Write its molecular formula.
user
C15H16N2O4S
assistant