You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
6-ethyl-14-fluoro-7-(3-methoxy-2-oxopentan-3-yl)-15-methyl-4,11-diazapentacyclo[10.7.1.02,10.04,9.016,20]icosa-1,6,8,10,12,14,16(20)-heptaen-5-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C27H29FN2O3
assistant