You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (3aR,5R,6S,7S,7aR)-5-(2-hydroxyethyl)-2-(4-methylanilino)-5,6,7,7a-tetrahydro-3aH-pyrano[2,3-d][1,3]oxazole-6,7-diol by IUPAC nomenclature, provide its molecular formula.
user
C15H20N2O5
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