You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (2E,4E)-4,6-diacetyloxy-2-methylhexa-2,4-dienoic acid;1-methyl-2-[(Z)-prop-1-enyl]cyclohexene by IUPAC nomenclature, provide its molecular formula.
user
C21H30O6
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