硫化砷(III), Arsenic(III) sulfide

亚细亚酸, Asiatic Acid

L-天冬氨酸钠一水合物, L-Aspartic acid monosodium salt monohydrate

L-Aspartic Acid 1-Methyl Ester

5-氮杂胞嘧啶, 5-Azacytosine

6-氮杂胸腺嘧啶, 6-Azathymine

吖丁啶-3-羧酸, Azetidine-3-carboxylic Acid

1,1'-(偶氮二羰基)二哌啶, 1,1'-(Azodicarbonyl)dipiperidine

1,2-双(2-氨基苯氧基)乙烷-N,N,N',N'-四乙酸四乙酯, BAPTA tetraethyl ester

碳酸钡, Barium carbonate

碘化钡水合物, Barium iodide hydrate

乙酰丙酮钡, Barium 2,4-pentanedionate

钛酸钡, Barium titanium oxide

红菲咯啉, Bathophenanthroline

苯脒肟, Benzamidoxime