3,4-Dimeth-oxy-N-(3-nitro-benzyl-idene)aniline.

The title compound, C(15)H(14)N(2)O(4), has two crystallographically independent mol-ecules in the asymmetric unit. In both mol-ecules, the nitro and the two meth-oxy substituents are coplanar with the benzene rings to which they are attached. The benzene rings are nearly coplanar, with dihedral angles between the two benzene rings of 10.

2-[1-(4-Ethoxy-phen-yl)-2-oxo-4-styryl-azetidin-3-yl]isoindoline-1,3-dione.

The title compound, C(27)H(22)N(2)O(4), contains a nearly planar four-membered β-lactam ring, which makes dihedral angles of 74.64 (12), 1.70 (11) and 73.