You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named N-(4-tert-butyl-1,3-thiazol-2-yl)-3-[1-(4-chlorophenyl)-2,5-dioxoimidazolidin-4-yl]propanamide by IUPAC nomenclature, provide its molecular formula.
user
C19H21ClN4O3S
assistant