You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
ethane;N-[(3E)-4-[3-(1-fluoro-1-phosphanylpropyl)phenyl]penta-1,3-dien-2-yl]formamide;4-methyloxane;pyrrolidin-2-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C27H44FN2O3P
assistant