cytosine and adenine

cytosine and guanine

cytosine and thymine

cytosine and uracil

4-phenylcyclopentene

2-phenylcyclopentene

1-phenylcyclopentene

3-phenylcyclopentene

a mixture of anisole and Mg(OH)Br

a mixture of benzene and Mg(OMe)Br

a mixture of toluene and Mg(OH)Br

a mixture of phenol and Mg(Me)Br

isomers of glucose that differ in configurations at carbons one and four (C-1 and C-4)

a mixture of (D)-glucose and (L)-glucose

enantiomers of glucose

isomers of glucose that differ in configuration at carbon one (C-1)