You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[2-[1,1-dimethoxy-2-(oxiran-2-yl)propan-2-yl]oxy-1,1-dimethoxypropan-2-yl]oxirane is the IUPAC name of a molecule. Please give its molecular formula.
user
C14H26O7
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