(5R,6R,7S)-5-ethyl-2,2,3,3,6,11,11,12,12-nonamethyl-4,10-dioxa-3,11-disilatridecan-7-yl 2-bromopropanoate

(3S,4R,5R)-5-((tert-butyldimethylsilyl)oxy)-1-hydroxy-4-methylheptan-3-yl 2-bromopropanoate

(1S,2R,3R)-3-(tert-butyldimethylsilyloxy)-2-methyl-1-(2-oxoethyl)pentyl 2-bromopropanoate