You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-(hydroxymethyl)-5-[(5-thiophen-2-yl-1,2,4-oxadiazol-3-yl)methoxy]pyran-4-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C13H10N2O5S
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