1,2:5,6-DI-O-ISOPROPYLIDENE-ALPHA-D-RIBO-3-HEXULOFURANOSE

Dicyclopentadiene diepoxide

1,2:5,6-Bis-O-(1-methylethylidene)-D-mannitol

1,2:5,6-Di-O-isopropylidene-alpha-D-allofuranose

1,2-BIS(3-CYCLOHEXENYL)ETHYLENE

1,2-BIS(3-CYCLOHEXENYL)ETHYLENE

ETHYLENEDIAMINE-N,N'-BIS-ACETOACETAMIDE

1,2-Bis(bromoacetoxy)ethane

1,2-BIS(DIMETHYLAMINO)-2-METHYLPROPANE

1,2-BIS(PYRROLIDINO)-ETHANE