You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[[2-[[2-[(2-amino-3-methylpentanoyl)amino]-3-(1H-imidazol-5-yl)propanoyl]amino]-3-sulfanylpropanoyl]amino]-3-hydroxybutanoic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H32N6O6S
assistant