You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 2-cyano-N-(furan-2-ylmethyl)-3-[2-[4-(4-methoxyphenyl)piperazin-1-yl]-4-oxopyrido[1,2-a]pyrimidin-3-yl]prop-2-enamide into its molecular formula.
user
C28H26N6O4
assistant