You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named 3-[3-[2-(methylamino)-2-sulfanylideneethoxy]phenyl]-N-(pyridin-3-ylmethyl)prop-2-enethioamide is given. What is its corresponding molecular formula?
user
C18H19N3OS2
assistant