Ethyl 4-(2-eth­oxy-2-oxoeth­yl)-3-oxo-4,13-di­aza­penta­cyclo­[11.8.0.0(2,11).0(5,10).0(14,19)]henicosa-1,5(10),6,8,11,14(19),15,17,20-nona­ene-12-carboxyl­ate

In the title compound, C(26)H(22)N(2)O(5), the system consisting of five fused rings, being essentially planar with an r.m.s. deviation from the least-squares plane of 0.049 (3) Å, makes a dihedral angle of 58.72 (12)° with the plane of the ethyl carboxyl­ate group immediately attached to it, and a dihedral angle of 89.48 (14)° with the plane of the ethyl carboxyl­ate group attached via the –CH(2)– bridge. Bond lengths indicate π-delocalization over the whole penta­cyclic system. The mol­ecular conformation is stabilized by a weak intra­molecular C—H⋯O hydrogen bond. In the crystal, mol­ecules form stacks along the b-axis direction, neighboring mol­ecules within each stack being related by inversion and the shortest distance between the centroids of the pyridine rings within the stack being 3.667 (2) Å.