You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named [(E)-2-[(2S,3aS,8S,9R,9aS)-8-[(E)-4-hydroxy-4-methylpent-2-enyl]-2-methoxy-2,8-dimethyl-3a,5,7,9-tetrahydro-3H-furo[2,3-i][2]benzofuran-9-yl]ethenyl] 3-methylbut-2-enoate by IUPAC nomenclature, provide its molecular formula.
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C26H38O6
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