You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 3-ethyl-N-[(4-propan-2-yl-5-sulfanylidene-1H-1,2,4-triazol-3-yl)methyl]pyridine-4-carboxamide into its molecular formula.
user
C14H19N5OS
assistant