You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 2-cyano-N-(4-ethoxyphenyl)-3-[2-(2-methoxyphenoxy)-4-oxopyrido[1,2-a]pyrimidin-3-yl]prop-2-enamide .
user
C27H22N4O5
assistant