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)-[1-[9-ethyl-6-[(Z)-(3-oxo-1-benzofuran-2-ylidene)methyl]carbazol-3-yl]-1-oxohexan-2-ylidene]amino] acetate .
user
C31H28N2O5
assistant