You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(E)-3-(6-methoxy-3,7-dimethyl-1-benzofuran-5-yl)-1-[4-(pyridin-4-ylmethyl)piperazin-1-yl]but-2-en-1-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C25H29N3O3
assistant