1,2,3,4-Tetrahydro-8-hydroxyquinoline

1,2,3,4-TETRA-O-ACETYL-A-L-FUCOPYRANOSE

1,2,4,4,4-PENTACHLOROPENTAFLUOROBUTANE

1,2,4,5-TETRACYANOBENZENE

1,2,4,5-TETRABROMOBENZENE

1,2,5,8-TETRAHYDROXYANTHRAQUINONE