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 [(3aR,4R,6aS,9aR,9bS)-6a-hydroperoxy-9-methyl-3,6-dimethylidene-2-oxo-3a,4,5,7,9a,9b-hexahydroazuleno[4,5-b]furan-4-yl] (E)-4-hydroxy-2-(hydroxymethyl)but-2-enoate .
user
C20H24O8
assistant