You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-butyl-3-[5-[2-(3-methylanilino)-2-oxoethyl]sulfanyl-3-oxo-2H-imidazo[1,2-c]quinazolin-2-yl]propanamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C26H29N5O3S
assistant