You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named benzyl N-[(2S)-1-[1-(3,4-difluorophenyl)ethylamino]-1-oxopropan-2-yl]carbamate is given. What is its corresponding molecular formula?
user
C19H20F2N2O3
assistant