4-[4 (S), 6 (S)-BIS- (TERT-BUTYL-DIMETHYL-SILANYLOXY)-1 (5), 7 (R)-dimethyl-10- trityloxy-deca-2,8-DIENYL]-2- (4-METHOXY-BENZYL)-5 S-METHYL- [1,3 (R)]dioxane

4(S)-[4(S),6(S)-bis(tert-butyldimethylsilanyloxy)-1(S),7(S)-dimethyl-10-trityloxydeca-2,8-dienyl]-2(R)-(4-methoxyphenyl)-5(S)-methyl[1,3]dioxane

(4R,5S,7S)-5,7,8-tris(tert-butyldimethylsilanyloxy)-4-methyloct-2-enoic acid ethyl ester

(4R,5S,7S)-5,7-bis(tert-butyldimethylsilanyloxy)-8-hydroxy-4-methyloct-2-enoic acid ethyl ester

5(S),7(S)-bis(tert-butyldimethylsilanyloxy)-10(S)-[2(R)-(4-methoxyphenyl)-5(S)-methyl[1,3]dioxan-4(S)-yl]-4(S)-methylundeca-2,8-dienoic acid ethyl ester