(2)), 3.68 nm (C14GL (3)), 4.09 nm (C16GL (4)), and 4.55 nm (C18GL ( )) corresponded to lamellar structures. This is consistent with the lamellar structures obtained when they are aligned at angles of approximately 70°, 68°, 67°, and 67° to the horizontal plane, respectively. This lamellar structure became thicker as the number of fatty acid increased. In contrast, compound 6 (C22GL) showed only a broad peak. It is thought that the clear diffraction peak was not observed because C22GL (6) was purified by silica gel column chromatography and to powder, whereas the other compounds were powders obtained by crystallization. Each compound showed an average diffraction peak of 0.4 nm in wide-angle diffractions, corresponding to the average distance of 0.4 nm between two paired fatty acid chains, as known from calculations.