2-乙酰基吡嗪, 2-Acetylpyrazine

2-乙酰喹喔啉, 2-Acetylquinoxaline

2-乙酰基噻唑, 2-Acetylthiazole

N-乙酰基-S-三苯基-L-半胱氨酸, N-Acetyl-S-trityl-L-cysteine

酸性品红钠盐, Acid Fuchsin sodium salt

2-丙烯酰胺-2-甲基丙烷磺酸, 2-Acrylamido-2-methylpropanesulfonic Acid

金刚烷, Adamantane

1-金刚烷乙醇, 1-Adamantaneethanol

1-金刚烷基 甲酮, 1-Adamantyl Methyl Ketone

腺苷-5'-单磷酸, Adenosine-5'-monophosphoric acid