(2R,3R)-1,2-bis-benzyloxy-5-[1,3]dithian-2-yl-pentan-3-ol

(1R,2'R)-2-benzyloxy-1-(5'-methoxy-tetrahydrofuran-2'-yl)-ethanol

(1'R,2R)-2-(1',2'-bis-benzyloxyethyl)-5-methoxy-tetrahydrofuran

(1'R,3aR,5R,7aR)-5-(1',2'-dibenzyloxy-ethyl)-hexahydro-furo[3,2-b]pyran-2-one

(1'R,1''R)-3-[1'-(1'',2''-dibenzyloxyethyl)-4'-oxo-butoxy]-acrylic acid ethyl ester