You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(E,2E)-4-ethyl-N'-[(2S)-1-oxo-3-phenylpropan-2-yl]-2-prop-2-enylidene-N,N-dipropylhex-3-enediamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C26H36N2O3
assistant