You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
tert-butyl N-[1-[[2-(butylamino)-1-(4-ethynylphenyl)-2-oxoethyl]-(5-methylhexan-2-yl)amino]-3-methyl-1-oxopentan-2-yl]carbamate is the IUPAC name of a molecule. Please give its molecular formula.
user
C32H51N3O4
assistant