21-benzoxy-(2R,6R,10R,14S,18S)-2,6,10,14,18-pentamethylheneicosyl p-toluenesulfonate

21-benzoxy-1-(tert-butyldiphenylsilyloxy)-(2R,6R,10R,14S,18S)-2,6,10,14,18-pentamethylheneicosane