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 (3S)-3-amino-4-[[(2R)-1-[[(1R)-2-methylsulfanyl-1-phenylethyl]amino]-1-oxopropan-2-yl]amino]-4-oxobutanoic acid ?
user
C16H23N3O4S
assistant