4-(4-ethylamino-(4-(N-ethylamino)-4'-(dimethylamino)stilbene))-1,4,7,10-tetraazacyclotridecane-11,13-dione
4-(4-ethylamino-(4-(n-ethylamino)-4'-(dimethylamino)stilbene))-1,4,7,10-tetraazacyclotridecane-11,13-dione