You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-[[3-[(2-ethoxyphenoxy)methyl]-4-methoxyphenyl]methylideneamino]-1H-1,2,4-triazole-5-thione The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H20N4O3S
assistant