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 4-[(3R,4R)-4-hydroxy-3-methyl-4-(oxan-4-yl)piperidin-1-yl]-2-methoxypyridine-3-carbonitrile ?
user
C18H25N3O3
assistant