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 [(1R,8S,9S)-8-anilino-1-[(1E)-2,6-dimethylhepta-1,5-dienyl]-3,6-dioxo-2-oxaspiro[4.5]decan-9-yl] acetate .
user
C26H33NO5
assistant