茴香偶酰, Anisil

蒽酮, Anthrone

硒化锑(III), Antimony(III) selenide

D-精氨酸, D-Arginine

硫化砷(III), Arsenic(III) sulfide

D-(-)-天冬酰胺 单水合物, D-(-)-Asparagine monohydrate

L-Aspartic acid 4-tert-butyl 1-methyl ester hydrochloride

O-(7-氮苯并三氮唑)-N,N,N',N'-四甲基脲六氟磷酸酯, O-(7-Aza-1H-benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium hexafluorophosphate

6-氮杂-2-硫代胸腺嘧啶, 6-Aza-2-thiothymine

3-氮杂环丁烷甲醇 盐酸盐, 3-Azetidinemethanol Hydrochloride