You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule identified by (2R)-2-[[(2S)-1-[(2S)-2-[[(2S)-2-[[(2S)-2-acetamido-3-(1H-imidazol-5-yl)propanoyl]amino]propanoyl]amino]propanoyl]pyrrolidine-2-carbonyl]amino]-3-phenylpropanethioic S-acid ?
user
C28H37N7O6S
assistant