Gravar-mail: Crystal structure of methyl 6-meth­oxy-11-(4-meth­oxy­phen­yl)-16-methyl-14-phenyl-8,12-dioxa-14,15-di­aza­tetra­cyclo­[8.7.0.0(2,7).0(13,17)]hepta­deca-2(7),3,5,13(17),15-penta­ene-10-carboxyl­ate