You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(3R,5Z,8S,11S)-8-ethyl-3,12-dimethyl-11-propan-2-yl-2-oxa-9,12-diazabicyclo[12.4.0]octadeca-1(18),5,14,16-tetraene-10,13-dione The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H32N2O3
assistant