You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 2-[(2E,4Z,6R,8E,10E)-12-[(4R,5S)-4-hydroxy-5-methyl-6-[(E)-prop-1-enyl]oxan-2-yl]-6,8-dimethyldodeca-2,4,8,10-tetraen-2-yl]-2,3-dihydropyran-6-one by IUPAC nomenclature, provide its molecular formula.
user
C28H40O4
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