You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
5,5-dimethyl-3-[3-[(2R,6R)-2-methyl-6-phenylmorpholin-4-yl]propyl]imidazolidine-2,4-dione is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H27N3O3
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