- 聚酰胺 jùxiān'àn polyamide(chemistry) polyamide
- 内酰胺酶 nèixiān'ànméi beta-lactamasebeta-lactamase (a bacterial enzyme that provides resistance to antibiotics)
- 天冬酰胺 tiāndōngxiān'àn asparagineasparagine (Asn), an amino acid
- 烟酰胺 yānxiān'àn nicotinamidenicotinamide; niacinamide
- 环磷酰胺 huánlínxiān'àn cyclophosphamidecyclophosphamide (medication)
- 谷氨酰胺 gǔ'ānxiān'àn glutamineglutamine (Gln), an amino acid
- 乙酰胺吡咯烷酮 yǐxiān'ànbǐluòwántóng piracetampiracetam (C6H10N2O2), a nootropic drug used in pharmacology to enhance cognitive function
