You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(1R,2R)-N-methyl-2-phenyl-N-(4,5,6,7-tetrahydro-1,2-benzoxazol-3-ylmethyl)cyclopropane-1-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H22N2O2
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