You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (1R,2R,4S)-2-amino-4-[5-[(3-chlorophenyl)methyl]-2-pyridin-2-yl-1,2,4-triazol-3-yl]cyclohexan-1-ol by IUPAC nomenclature, provide its molecular formula.
user
C20H22ClN5O
assistant