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 (E)-3-[3-[3-[(E)-2-[3-(dimethylamino)propylamino]prop-1-enyl]iminoprop-1-en-2-yl]phenyl]prop-2-enoic acid .
user
C20H27N3O2
assistant