You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
19-methoxy-20-methyl-23-oxo-12-sulfanylidene-16-oxa-11,13-diazatetracyclo[11.5.5.04,9.015,18]tricosa-4(9),5,7-triene-7-carbonitrile The above is the IUPAC name of a molecule. Write its molecular formula.
user
C23H29N3O3S
assistant