You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[5-[(4,5-dimethyl-1,2,4-triazol-3-yl)sulfanyl]pyridin-2-yl]-N-ethylpropan-1-amine is the IUPAC name of a molecule. Please give its molecular formula.
user
C14H21N5S
assistant