You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (3S,5R)-5-[(E,2R)-7-[(4-methoxyphenyl)methoxy]-2,6-dimethylhept-5-enyl]-3-(1-trimethylstannylethenyl)oxolan-2-one by IUPAC nomenclature, provide its molecular formula.
user
C26H40O4Sn
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