You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[2-[[(2R)-1-methoxy-1-oxo-3-phenylpropan-2-yl]amino]-2-oxoethyl] 1,3-benzodioxole-5-carboxylate is the IUPAC name of a molecule. Please give its molecular formula.
user
C20H19NO7
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