You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[2-[benzyl-[(5-methylthiophen-2-yl)methyl]amino]-2-oxoethyl]-2-chloro-N-(3-ethoxypropyl)-2-phenylacetamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C28H33ClN2O3S
assistant