You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named methyl (2S)-2-[[(E)-3-[5-(2-fluorophenyl)furan-2-yl]prop-2-enoyl]amino]-3-methylbutanoate by IUPAC nomenclature, provide its molecular formula.
user
C19H20FNO4
assistant