You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named [2-[3-formyloxy-5-(2-hydroxypropoxy)-6-methoxy-3,9-dimethyl-1,8-dioxaspiro[3.5]nonan-7-yl]-3-methyloxetan-3-yl] formate by IUPAC nomenclature, provide its molecular formula.
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C19H30O10
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