4-Chloro-7-(2-methoxyethyl)-7H-pyrrolo[2,3-d]pyrimidine

4-Chlorosulfonyl-benzoic acid methyl ester

4-Cyanobenzene-1-sulfonamide

4-cyclopropyl-benzeneboronic acid

4-Ethylthiazole-5-carboxylic acid

4-Fluoro-α-methylstyrene

4-Formylbenzenesulfonyl chloride

4-Hydroxy-2-methylbenzaldehyde

4-Hydroxybenzoic Acid

对羟基苯甲酸

4-Iodo-5-methyl-isoxazole

4-methoxy-3-methyl-benzenesulfonyl chloride

4-Methoxyphenyl ester fluorosulfuric acid

氟磺酸4-甲氧苯酯

4-Methyl-2-phenyl-1,3-thiazole-5-sulfonyl chloride

4-Methyl-5-phenyl-2-thiophenecarboxylic acid

4-Oxo-N,1-diphenyl-1,4-dihydro-3-pyridazinecarboxamide