- 聚酰胺 jùxiān'àn polyamide(chemistry) polyamide
- 内酰胺酶 nèixiān'ànméi beta-lactamasebeta-lactamase, which is a bacterial enzyme that provides resistance to some antibiotics
- 天冬酰胺 tiāndōngxiān'àn asparagineasparagine (Asn), a non-essential amino acid
- 烟酰胺 yānxiān'àn nicotinamidenicotinamide; niacinamide; a form of vitamin B3 often used in medicine and skincare
- 环磷酰胺 huánlínxiān'àn cyclophosphamidecyclophosphamide; a medication used as chemotherapy and to suppress the immune system
- 谷氨酰胺 gǔ'ānxiān'àn glutamineglutamine; an amino acid often abbreviated as Gln
- 乙酰胺吡咯烷酮 yǐxiān'ànbǐluòwántóng piracetam(pharmacology) piracetam (C6H10N2O2), a drug used to improve memory and brain function
