You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(E)-N-[3-[[2-[(3-chloro-1-methylpyrazol-4-yl)amino]-5-[2-(N-methylanilino)ethyl]-1,4-dihydropyrimidin-4-yl]-formylamino]phenyl]-4-[ethyl(propyl)amino]but-2-enamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C33H42ClN9O2
assistant