You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as 2-[[6-[(2R)-2-(4-fluorophenyl)propyl]-4-methylpyridin-2-yl]methyl]pyrazine;hydrochloride using the IUPAC nomenclature.
user
C20H21ClFN3
assistant