2-Aminopyrimidine-5-carboxaldehyde

2-Ethynyl-α,α,α-trifluorotoluene

2-乙炔基-α,α,α-三氟甲苯

2-Iodophenylboronic acid

2-碘苯硼酸

2,2′:5′,2′′:5′′,2′′′-Quaterthiophene

α-四联噻吩

2,3,5,6-Tetrafluoro-4-(trifluoromethyl)phenol

2,3,5,6-四氟-4-三氟甲基苯酚

2,5-Dibromo-1-methyl-1H-imidazole

2,5-二溴-1-甲基-1H-咪唑

25-Hydroxyvitamin D₂

骨化二醇

3-(Difluoromethyl)pyridine

3-（二氟甲基）吡啶

3-Aminopyridine-4-carboxylic Acid

3-氨基异烟酸

3-Bromothiophene-2-carboxaldehyde

3-溴噻吩-2-甲醛

3,4-Diamino-2-chloropyridine

3,4-二氨基-2-氯吡啶