You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule N-[(2R)-butan-2-yl]-2-[(7S)-7-(4-chlorophenyl)-5-phenyl-7H-tetrazolo[1,5-a]pyrimidin-4-yl]acetamide .
user
C22H23ClN6O
assistant