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 1-(2-ethylpiperidin-1-yl)-2-[(4-methyl-5-phenyl-1,2,4-triazol-3-yl)sulfanyl]propan-1-one using the IUPAC nomenclature.
user
C19H26N4OS
assistant