Benzoic acid (S)-2-((4S,5S)-5-ethynyl-2,2-dimethyl-[1,3]dioxolan-4-yl)-1-methyl-ethyl ester

benzoic acid 2-(2,2-dimethyl-5-prop-1-ynyl-[1,3]dioxolan-4-yl)-1-methyl-ethyl ester

6-O-benzoyl-1,1-dibromo-5,7-dideoxy-3,4-O-isopropyliden-L-arabino-hept-1-ene

(2S,4R)-1-[1,3]Dithian-2-ylidene-4-(tetrahydro-pyran-2-yloxy)-pentan-2-ol