Dimethyl terephthalate (Standard) is the standard substance of Dimethyl terephthalate, and it is applicable for quantitative analysis, quality control, and related research in biochemical experiments. Dimethyl terephthalate is a diester obtained from terephthalic acid and methanol. It is a white solid that melts to give a distillable colorless liquid.

5,6-dimethyl-2-Thiouracil (Standard) is the standard substance of 5,6-dimethyl-2-Thiouracil, and it is applicable for quantitative analysis, quality control, and related research in biochemical experiments. 5,6-dimethyl-2-Thiouracil is a heterocyclic building block that has been used in the synthesis of anti-HIV-1 pyrimidinones.1 It has also been used as an internal standard for the quantification of thyreostats, including 2-thiouracil, in bovine plasma.2

Benzaldehyd-2，4-dinitrophenylhydrazone (Standard)是Benzaldehyd-2，4-dinitrophenylhydrazone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。

C18:1T 11-trans-Octadecenoic acid methyl ester (Standard)是C18:1T 11-trans-Octadecenoic acid methyl ester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。Methyl trans-11-Octadecenoate是一种高纯度生化试剂，适合作为生物材料或有机合成中间体，广泛应用于生命科学领域的研究与实验。

Biotin-D2 (Standard) 是 Biotin-D2 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。Biotin-d2 是 Biotin 的氘代化合物。Biotin 的 CAS 号为 58-85-5。Biotin 是一种水溶性B族维生素，是细胞生长、脂肪酸产生以及脂肪和氨基酸代谢所必需的。

5β,6β-epoxycholestanol (Standard) 是一种可用于分析的标准物质，通常用作 5β,6β-epoxycholestanol 的研究和分析中参考的标准样品。5β,6β-epoxycholestanol 是由胆固醇在 5,6 双键处进行自由基或非自由基氧化后生成的氧化代谢物。在 U937 巨噬细胞样分化细胞中，该化合物可引发乳酸脱氢酶 (LDH) 的释放和诱导细胞凋亡。5β,6β-epoxycholestanol 已在人体脂肪条纹及晚期动脉粥样硬化病变中发现，但在正常主动脉组织中不存在。