You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(3,5-dimethyl-1,2-oxazol-4-yl)-[4-[(4-methoxyphenyl)methyl]-1,4-diazepan-1-yl]methanone The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H25N3O3
assistant