You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(2,3-dihydro-1H-cyclopenta[b]quinolin-9-yl)-2-[2-(1H-indol-3-yl)ethylamino]acetamide;oxalic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C26H26N4O5
assistant