6,12-dibromo-9-(tert-butyldimethyl-silanyloxy)-2,4,8-trimethyl-15-phenyl-pentadeca-2,4,6,10,12-pentaenoic acid 2-trimethylsilanyl-ethyl ester

6-bromo-9,15-bis(tert-butyl-dimethyl-silanyloxy)-2,4,8,12-tetramethyl-pentadeca-2,4,6,10,12-pentaenoic acid 2-trimethylsilanyl-ethyl ester