O-(2S,3S,4R,5R,6S)-1,7-di(tert-butyldimethylsilyloxy)-2,4,6-trimethylheptan-3-yl S-methyl carbonodithioate

(2R,3R)-2-((benzyloxy)methyl)-3-ethyl-2-methyloxirane

(4S,5R)-4-((benzyloxy)methyl)-5-ethyl-2,2,4-trimethyl-1,3-dioxolane