You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[(9aS)-3-(3-cyclopropyl-4-fluorophenyl)-3,4,6,7,9,9a-hexahydro-1H-pyrazino[2,1-c][1,4]oxazin-8-yl]-(2-chloro-3-methoxyphenyl)methanone is the IUPAC name of a molecule. Please give its molecular formula.
user
C24H26ClFN2O3
assistant