You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-tert-butyl-N-[(2R)-1-(3-cyclohexylpropylamino)-4-methylsulfanyl-1-oxobutan-2-yl]carbamate is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H35N2O3S-
assistant