c21

Qingyangshengenin (Cynanchagenin) is a steroid used in the preparation of antiepileptic agents.

Heneicosanoic acid (C21:0) (HEA) is a fatty acid found in human milk fat. HEA is also a part of the phospholipids of the articular cartilage boundary lubricant. HEA is a constituent of red blood cell fatty acids.

Tenacissoside G is a C21 steroid from the stem of Marsdenia tenacissima. It reverses multidrug resistance in multidrug-resistant cancer cells overexpressing P-glycoprotein.

Tenacissoside I (Tenacissimoside B),Tenacissosides B, C and marsdenoside K inhibit the proliferation of Raji, NB4 and K562 cells in vitro significantly, in a dose and time dependent manner.

Heneicosanoic acid (Standard) is the standard substance of Heneicosanoic acid, and it is applicable for quantitative analysis, quality control, and related research in biochemical experiments. Heneicosanoic acid (C21:0) (HEA) is a fatty acid found in human milk fat. HEA is also a part of the phospholipids of the articular cartilage boundary lubricant. HEA is a constituent of red blood cell fatty acids.

Otophylloside B 4'''-O-beta-D-oleandropyranoside is a natural C21 steroidal glycoside that exhibits micromolar-level in vitro inhibitory activity against five human tumour cell lines (HL-60, SMMC-7721, A-549, MCF-7, and SW480) with micromolar-level in vitro inhibitory activity, IC₅₀ = 12.2–>40 μM.

Cynanoside J, a C21 steroidal glycoside derived from Cynanchum taihangense, exhibits IC50 values of 6.38, 5.82, and 6.76 μM against HL-60, THP1, and Caco2 cell lines, respectively. This compound can be utilized in cancer research [1].