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 2-(2-methyl-1,3-thiazol-4-yl)-N-[(9S)-1-phenyl-3,6-diazatricyclo[4.3.1.13,8]undecan-9-yl]acetamide ?
user
C21H26N4OS
assistant