乙酸酐

(5S,6R,1'S, 2'S)-5-t-butyldimethylsiloxy-3-(1',2'-epoxypropyl)-6-methyl-5,6-dihydro-2H-pyran-2-one

(5S,6R)-5-t-butyldimethylsiloxy-6-methyl-3-phenylselenotetrahydro-2H-pyran-2-one

(2R,3S)-6-(benzyloxy)-2-methyl-3,6-dihydro-2H-pyran-3-ol

benzyl 4-O-acetyl-2,3,6-trideoxy-D-erythro-hex-2-enopyranoside