You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name ethyl 2-[[(3E,5Z)-hepta-1,3,5-trien-3-yl]amino]-4-hydroxy-5-[(Z)-pyrrolo[2,3-b]pyridin-3-ylidenemethyl]furan-3-carboxylate into its molecular formula.
user
C22H21N3O4
assistant