Gravar-mail: 2-[1-({2-[1-(2-Hy­droxy-5-{[meth­yl(phen­yl)amino]­meth­yl}phen­yl)ethyl­idene­amino]­eth­yl}imino)­eth­yl]-4-{[meth­yl(phen­yl)amino]­meth­yl}phenol