You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance ethyl (2E)-2-(6-ethoxy-2,2-dimethyl-3-sulfanylidene-1H-quinolin-4-ylidene)-1,3-dithiole-4-carboxylate .
user
C19H21NO3S3
assistant