The highly symmetric 13-aza-4,4,8,8,12,12-hexamethyl-2,6,10-trioxatricyclo[7,3,l,0513]tridecane is of general interest regarding several aspects. First, the molecule belongs to the rare point group C3. Second it is being discussed as a possible complexing agent [1]. Furthermore the title compound is quite inert against some drastic reaction con ditions, e.g. it does not react with lithium alu...