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 methyl (2Z,4E)-5-(1,4-dihydroxy-2,6-dimethylcyclohexa-2,5-dien-1-yl)-3-methylpenta-2,4-dienoate .
user
C15H20O4
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