C32-O-Ether derivatives of L683.590 have been prepared by alkylation with various alkyl, alkenyl, and alkynyl 2,2,2-trichloroacetimidates. These analogs exhibit good immunosuppressive activity in vitro, as measured in a T cell proliferation assay. In the case of cinnamyl ethers, this activity correlates with the lipophilicity (π value) of the aromatic substituents.