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 5-chloro-2-[4-[[(1R,2R)-2-[(4-methylsulfonylphenoxy)methyl]cyclopropyl]methyl]piperidin-1-yl]pyrimidine .
user
C21H26ClN3O3S
assistant