You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule [(3R)-4-(cyclopropylmethyl)-3-propan-2-yl-1,4-diazepan-1-yl]-(5-hydroxypyridin-2-yl)methanone ?
user
C18H27N3O2
assistant