You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 4-[[2-butyl-5-[(Z)-[3-[(4-chlorophenyl)methyl]-2,5-dioxoimidazolidin-4-ylidene]methyl]imidazol-1-yl]methyl]-2-methylbenzoic acid by IUPAC nomenclature, provide its molecular formula.
user
C27H27ClN4O4
assistant