You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
methyl 2-[[(2R)-2-[[(2S)-2-[[(2R)-2-(9H-fluoren-9-ylmethoxycarbonylamino)-2-fluoroacetyl]amino]-3-tritylsulfanylpropanoyl]amino]-2-fluoroacetyl]amino]acetate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C44H40F2N4O7S
assistant