You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
5-[(10-methyl-9H-acridin-2-yl)methylidene]-1-(4-phenoxyphenyl)-2-sulfanylidene-1,3-diazinane-4,6-dione is the IUPAC name of a molecule. Please give its molecular formula.
user
C31H23N3O3S
assistant