You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 4-[4-methyl-5-[(1R)-1-(3-nitrophenyl)ethyl]sulfanyl-1,2,4-triazol-3-yl]pyridine into molecular formula.
user
C16H15N5O2S
assistant