You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the compound with this IUPAC name 6-chloro-7-(2,4-difluorophenyl)-1-(3-methyl-5-propan-2-yl-1,2-oxazol-4-yl)-4-[(2S)-2-methyl-4-prop-2-enoylpiperazin-1-yl]pyrido[2,3-d]pyrimidin-2-one ?
user
C28H27ClF2N6O3
assistant