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,10R,11S)-6-(hydroxymethyl)-11-methoxy-1,10-dimethyl-5-oxo-4,14-dioxatricyclo[9.2.1.03,7]tetradeca-2,6-dien-8-yl] (Z)-2-methylbut-2-enoate .
user
C21H28O7
assistant