You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[1,8a-dimethyl-5-(3-methylbut-2-enoyloxy)-6-oxo-7-prop-1-en-2-yl-1,2,3,4,4a,5,7,8-octahydronaphthalen-2-yl] (E)-2-methylbut-2-enoate is the IUPAC name of a molecule. Please give its molecular formula.
user
C25H36O5
assistant