- 乙酸基 yǐsuānjī acetoxy group(chemistry) acetoxy group or acetate radical CH3COO-
- 乙酸根 yǐsuāngēn acetatethe acetate radical or anion CH3COO-
- 乙酸盐 yǐsuānyán acetateacetate; a salt or ester of [[乙酸|乙酸|yi3 suan1]]
- 二氯苯胺苯乙酸钠 èrlǜběn'ànběnyǐsuānnà diclofenac sodiumdiclofenac sodium, a non-steroidal anti-inflammatory drug used to reduce swelling and as a painkiller; also known as [[扶他林|扶他林|fu2 ta1 lin2]]
- 氨基乙酸 ānjīyǐsuān glycineaminoacetic acid, an amino acid that is a major constituent of many proteins and acts as a neurotransmitter