You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 2-[(5-cyclopropyl-4-ethyl-1,2,4-triazol-3-yl)sulfanyl]-N-[2-(4-ethoxyphenoxy)ethyl]acetamide by IUPAC nomenclature, provide its molecular formula.
user
C19H26N4O3S
assistant