1,6-脱水β-D-吡喃葡萄糖, 1,6-Anhydro-beta-D-glucopyranose

9-蒽烯甲醇, 9-Anthracenemethanol

蒽酮, Anthrone

氧化锑(III), Antimony(III) oxide

氧化锑锡, Antimony tin oxide

DL-精氨酸, DL-Arginine

硒化砷(III), Arsenic(III) selenide

碲化砷(III), Arsenic(III) telluride

亚细亚酸, Asiatic Acid

L-天冬氨酸, L-Aspartic Acid

L-Aspartic Acid Di-tert-butyl Ester Hydrochloride

4-氮杂苯并咪唑, 4-Azabenzimidazole

4-氮杂吲哚, 4-Azaindole

6-氮杂-2-硫代胸腺嘧啶, 6-Aza-2-thiothymine

氮杂环丁烷, Azetidine