7-(tert-Butyl-dimethyl-silanyloxy)-5-formyl-heptanoic acid

methyl 5-<<(hydroxyamino)carbonyl>methyl>-6(E),8(Z),11(Z),14(Z)-eicosatetraenoate

(6E,8Z,11Z,14Z)-5-[2-(tert-Butyl-dimethyl-silanyloxy)-ethyl]-icosa-6,8,11,14-tetraenoic acid methyl ester