You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl] 3-methyl-6-phenyl-[1,2]oxazolo[5,4-b]pyridine-4-carboxylate is the IUPAC name of a molecule. Please give its molecular formula.
user
C20H20N2O5
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