You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2S)-2-[[2-[[(2S)-2-amino-4-methylpentanoyl]amino]acetyl]amino]-3-(1H-imidazol-5-yl)propanoic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C14H23N5O4
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