You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[(1R,11R)-10-(2-methylpropyl)-9,9-dioxo-2-oxa-9lambda6-thia-10,14-diazatricyclo[9.5.0.03,8]hexadeca-3,5,7-trien-14-yl]-phenylmethanone is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H28N2O4S
assistant