You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2R)-2-[[2-[2-(1H-imidazol-2-yl)ethylsulfanyl]-2-methylpropanoyl]amino]-3-tritylsulfanylpropanoic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C31H33N3O3S2
assistant