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 N-(2-ethoxyphenyl)-N-(4-oxo-3H-pyrido[2,3-d]pyrimidin-2-yl)-3-phenylpiperazine-1-sulfonamide .
user
C25H26N6O4S
assistant