You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[(1R,2S,4R)-2-hydroxy-1,7,7-trimethyl-2-bicyclo[2.2.1]heptanyl]-N,N-dimethylacetamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C14H25NO2
assistant