9-cis-(tert-Butyldimethylsilyl)retinyl Ether

(1,1-Dimethylethyl)[[(2E,4E,6Z,8E)-3,7-dimethyl-9-(2,6,6-trimethyl -1-cyclohexen-1-yl)-2,4,6,8-nonatetraenyl]oxy]dimethylsilane