Showing structure for (2's,3's,4r)-2''-imino-2'-(1h-indol-3-yl)-1,1'',3,3''-tetramethyl-4',9'-dihydro-2'h-dispiro[imidazolidine-4,1'-carbazole-3',4''-imidazolidine]-2,5,5''-trione