Antihistamines or H1 blockers

4，7-Dimethyl-2H-chromen-2-one.

4，7-Dimethyl-2H-chromen-2-one.

4-(1H-Pyrrol-1-yl)benzenesulfonamide.

4-(1H-Pyrrol-1-yl)benzenesulfonamide.

Other Notes Please note that Sigma-Aldrich provides this product to early discovery researchers as part of a collection of unique chemicals. Sigma-Aldrich does not collect analytical data for this product.

4-amino-2，5-dimethoxybenzenesulfonamide.

Application 4-Amino-3,6-disulfo-1,8-naphthalic anhydride dipotassium salt has been used to synthesize the fluorescent peptide analog, Lucifer yellow anhydride.

4-Aminobutan-2-ol.

4-Aminobutan-2-ol.

4-Aminobutan-2-ol.

4-bromo-1,2-dihydrophthalazin-1-one.

4-bromo-1,2-dihydrophthalazin-1-one.