蒽酮, Anthrone

氧化锑, Antimony(III) oxide

DL-精氨酸, DL-Arginine

硫化砷(III), Arsenic(III) sulfide

DL-天门冬素一水化合物, DL-Asparagine Monohydrate

L-天冬氨酸 4-叔-丁基酯, L-Aspartic Acid 4-tert-Butyl Ester

(7-氮杂-1H-苯并三唑-1-基氧)三(1-吡咯烷基)磷 六氟磷酸盐, (7-Aza-1H-benzotriazol-1-yloxy)tri(1-pyrrolidinyl)phosphonium hexafluorophosphate

7-氮杂吲哚-3-羧酸, 7-Azaindole-3-carboxylic acid

吖丁啶-3-羧酸, Azetidine-3-carboxylic Acid

偶氮甲碱-H 单钠盐水合物, Azomethine-H monosodium salt hydrate