You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name [(3aR,4R,5Z,11aS)-6-methyl-3,10-dimethylidene-2,9-dioxo-3a,4,7,8,11,11a-hexahydrocyclodeca[b]furan-4-yl] (Z)-2-methylbut-2-enoate into its molecular formula.
user
C20H24O5
assistant