You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(3S)-1-[(2R)-2,6-dimethyl-2,3-dihydro-1,4-benzoxazine-4-carbonyl]-N-(3-phenylpropyl)piperidine-3-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C26H33N3O3
assistant