You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(3Z,5E)-6-ethoxyocta-1,3,5-triene;[1-[3-(ethylamino)propyl]-7-methoxyindol-3-yl]-phenylmethanone is the IUPAC name of a molecule. Please give its molecular formula.
user
C31H40N2O3
assistant