You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[4-[2-[(4S)-2-amino-4,5-dihydro-1,3-oxazol-4-yl]ethyl]phenyl]cyclohexanecarboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C18H25N3O2
assistant