You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named [2-[9-[1-[3-(3-tert-butyl-4-hydroxy-5-methylphenyl)propanoyloxy]-2-methylpropan-2-yl]-1,3,8,10-tetraoxaspiro[5.5]undecan-2-yl]-2-methylpropyl] 3-(3-tert-butyl-4-hydroxy-5-methylphenyl)propanoate by IUPAC nomenclature, provide its molecular formula.
user
C43H64O10
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