You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (1R,3R,5R,6R,7S,8R)-1-methoxy-3-propyl-3,4,5,6,7,8-hexahydro-1H-isochromene-5,6,7,8-tetrol by IUPAC nomenclature, provide its molecular formula.
user
C13H22O6
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