Shiozaki M, Tashiro T, Koshino H, Nakagawa R, Inoue S, Shigeura T, et al. Synthesis and biological activity of ester and ether analogues of alpha-galactosylceramide (KRN7000). Carbohydr Res. 2010;345:1663-84 pubmed publisher
..Ester analogues 30a, 31a, and 61 showed activity for IFNgamma and IL-4 production of iNKT cells, while ether (31b) and 4-methoxy ester (76) analogues of alpha-galactosylceramide were not active for iNKT cells. ..