You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2S)-2-[[[(2S)-2-carboxy-2-[[(4S)-4-carboxy-4-[(4-fluorobenzoyl)amino]butanoyl]amino]ethoxy]-hydroxyphosphoryl]amino]pentanedioic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C20H25FN3O13P
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