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 3-[(1-ethyl-3,4-dihydroquinolin-2-ylidene)methyl]-5-[(1-ethylquinolin-1-ium-2-yl)methylidene]-4-hydroxycyclopent-3-ene-1,2-dione .
user
C29H27N2O3+
assistant