You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
ethyl (2E)-2-cyano-2-[(4R,5S)-4-(hydroxymethyl)-5-phenyl-1,3-oxazolidin-2-ylidene]acetate is the IUPAC name of a molecule. Please give its molecular formula.
user
C15H16N2O4
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