2,7-Dioxa-15,19-di­aza­tri­cyclo­[19,4,0,08,13]­pentacosa-8,10,12,21,23,25(1)-hexaene

The title mol­ecule, C21H24N2O2, is a macrocyclic multidentate Schiff base ligand containing two imine N and two ether O atoms which has a crystallographic twofold axis. The macro­cyclic inner-hole size, estimated as twice the mean distance of the donor atoms from their centroid, is approximately 2.08 A.