You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 2-[[4-amino-5-(4-methylphenyl)-1,2,4-triazol-3-yl]sulfanyl]-N-(5-chloro-2-methylphenyl)propanamide into molecular formula.
user
C19H20ClN5OS
assistant