You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 2-(2-pyridin-3-yl-1,3-thiazol-4-yl)-N-[(1R,2S,4S)-1,7,7-trimethyl-2-bicyclo[2.2.1]heptanyl]acetamide into molecular formula.
user
C20H25N3OS
assistant