4-Epitetracycline hydrochloride (Standard) is the standard substance of 4-Epitetracycline hydrochloride, and it is applicable for quantitative analysis, quality control, and related research in biochemical experiments. Epitetracycline is an epimer of the antibiotic tetracycline . Epimers of tetracycline form without catalysis and are considered degradation products. Epitetracycline has decreased activity as an antibiotic or a Tet repressor effector but may have stronger toxic effects in animals.

Progesterone-[2,3,4-13C3] (Standard) 是 Progesterone-[2,3,4-13C3] 的标准品，适用于定量分析、质量控制及生化实验等相关研究。

Poly(hexamethylene diisocyanate) (Standard)是Poly(hexamethylene diisocyanate)的标准品，适用于定量分析、质量控制及生化实验等相关研究。

Hexanoyl Carnitine-D3 Hcl (Standard) 是 Hexanoyl Carnitine-D3 Hcl 的标准品，适用于定量分析、质量控制及生化实验等相关研究。Hexanoyl carnitine-d3 HCl 是 Hexanoyl carnitine HCl 的氘代化合物。

Nonadecane (Standard) 是 Nonadecane 的标准品，适用于定量分析、质量控制及生化实验等相关研究。Nonadecane 是一种有用的有机化合物，可用于生命科学领域的相关研究。其产品编号为 T124513，CAS号为 629-92-5。

ST029248 (Standard) is the standard substance of ST029248, and it is applicable for quantitative analysis, quality control, and related research in biochemical experiments. ST029248 is a potent mast cell (MC) activator, promoting de novo synthesis of cytokines and inducing the release of eicosanoids from human and mouse MCs.