You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(3Z)-2-oxo-3-[1-[5-(2-pyrrolidin-3-ylethoxy)-2,3-dihydro-1H-indol-2-yl]ethylidene]-1H-indole-5-carboxylic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C25H27N3O4
assistant