chromatography

Sodium 1-heptanesulfonate monohydrate，用于Ion-Pair Chromatography，是HPLC的离子对试剂，适合分析多肽和蛋白质。

Enflurane (Efrane) 是一种挥发性麻醉剂，是 Chara australis 高电导 Ca2+ 激活的 K+ 通道的有效抑制剂。 安氟醚是通过顶空气相色谱-质谱法监测卤化挥发性麻醉剂的内标。 它可以快速调整麻醉深度，而脉搏或呼吸频率几乎没有变化。

磷酸二氢钾 (Potassium phosphate monobasic), formolecular biology, ≥ 99%，用于分子生物学、生物化学和色谱法中的缓冲剂，适合制备生物缓冲液。

Hematoporphyrin dihydrochloride (Hematoporphyrin IX dihydrochloride) 是一种光敏剂，是血红素结合蛋白亲和色谱底物。它暴露在红光下时，可诱导 U87 胶质瘤细胞凋亡，并降低体内肿瘤的生长。

Hydroxy Dimetridazole 是Dimetridazol 的羟基化代谢产物。Dimetridazol 是一种硝基咪唑类药物，可用于对抗原生动物感染。

Hydrocortisone hemisuccinate (hydrocortisone 21-hemisuccinate*free acid) 是糖皮质激素， 是口服有活性的甾体抗炎剂。它能够降低IL-6(IC50:6.7 μM)、IL-3(IC50:21.4 μM)的生物活性，可用于研究溃疡性结肠炎。

6-Hydroxynicotinic acid (6-Hydroxypyridine-3-carboxylic acid) 用于核磁共振波谱或气相色谱-质谱法诊断尿路感染中的铜绿假单胞菌。在引起尿液感染的常见细菌中，只有铜绿假单胞菌从烟酸中产生6-羟基烟酸。

2',4'-Dimethylacetophenone 是一种可用于生物研究的化学物。该化合物可用于气相色谱法检测烟草化合物中的醛固酮香气，可以用于保护食品。

Gibbs reagent 是一种用于薄层色谱的多功能可视化试剂。

Ammonium trifluoroacetate 是用于调节和校准新液相色谱 质谱系统的添加剂。

Hematoporphyrin is a substrate for affinity chromatography of heme-binding proteins.

D-Desthiobiotin 是一种生物素衍生物，用于蛋白质层析和亲和层析，也用于蛋白质和细胞的标记、检测和分离。

Leucyl-leucyl-leucine is may be used for pH-dependent endosomal membrane disruption to release agents. Trileucine is used to evaluate the absorption characteristics of reversed phase liquid chromatography (HPLC) media.

Robinin是一种来源于Robinia的黄酮苷类化合物，具有抗菌和利尿的特性，其衍生自kaempferol。通过监测Colo 320细胞系（表达MDR1 LRP）对Rhodamine 123的吸收情况，探讨了robinin逆转人类结肠癌细胞多药耐药性的能力，但结果显示其效果有限。在使用液相色谱-串联质谱法检测人类乳腺癌细胞系MCF-7的细胞裂解物时，发现了Robinin (NSC-9222)的存在。

Diazodiiodoarsenic acid was used to isolate plasma membrane proteins from platelets by means of affinity chromatography.

(±)10-HDHA is an autoxidation product of docosahexaenoic acid (DHA) in vitro.[1][2] It is also produced from incubations of DHA in rat liver, brain, and intestinal microsomes.[3][4][5] (±)10-HDHA is a potential marker of oxidative stress in brain and retina where DHA is an abundant polyunsaturated fatty acid. Reference：[1]. VanRollins, M., and Murphy, R.C. Autooxidation of docosahexaenoic acid: Analysis of ten isomers of hydroxydocosahexaenoate. J. Lipid Res. 25(5), 507-517 (1984).[2]. Reynaud, D., Thickitt, C.P., and Pace-Asciak, C.R. Facile preparation and structural determination of monohydroxy derivatives of docosahexaenoic acid (HDoHE) by α-tocopherol-directed autoxidation. Anal. Biochem. 214(1), 165-170 (1993).[3]. VanRollins, M., Baker, R.C., Sprecher, H., et al. Oxidation of docosahexaenoic acid by rat liver microsomes. J. Biol. Chem. 259(9), 5776-5783 (1984).[4]. Yamane, M., Abe, A., and Yamane, S. High-performance liquid chromatography-thermospray mass spectrometry of epoxy polyunsaturated fatty acids and epoxyhydroxy polyunsaturated fatty acids from an incubation mixture of rat tissue homogenate. J. Chromatogr. 652(2), 123-136 (1994).[5]. Kim, H.Y., Karanian, J.W., Shingu, T., et al. Sterochemical analysis of hydroxylated docosahexaenoates produced by human platelets and rat brain homogenate. Prostaglandins 40(5), 473-490 (1990).

trans-carboxy Glimepiride is a metabolite of the sulfonylurea glimepiride .1It is formed from glimepiride in a two-step process mediated by the cytochrome P450 (CYP) isoform CYP2C9 and cytosolic enzymes. 1.Noh, K., Kim, E., Jeong, T.C., et al.Simultaneous determination of glimepiride and its metabolites in human plasma by liquid chromatography coupled to a tandem mass spectrometryArch. Pharm. Res.34(12)2073-2078(2011)

Pregnanetriol is a metabolite of 17α-hydroxyprogesterone .1,2It is formed from 17α-hydroxyprogesterone by reduction of the C-20 ketone.2Urinary levels of pregnanetriol are elevated in patients with 21-hydroxylase deficiency and congenital adrenal hyperplasia.3,4 1.Kamrath, C., Hartmann, M.F., Boettcher, C., et al.Diagnosis of 21-hydroxylase deficiency by urinary metabolite ratios using gas chromatography-mass spectrometry analysis: Reference values for neonates and infantsJ. Steroid Biochem. Mol. Biol.15610-16(2016) 2.Schiffer, L., Barnard, L., Baranowski, E.S., et al.Human steroid biosynthesis, metabolism and excretion are differentially reflected by serum and urine steroid metabolomes: A comprehensive reviewJ. Steroid Biochem. Mol. Biol.194105439(2019) 3.Disorders of steroidogenesis guide to steroid profiling and biochemical diagnosis1(2019) 4.Shackleton, C.H.L.Role of a disordered steroid metabolome in the elucidation of sterol and steroid biosynthesisLipids47(1)1-12(2012)

N-desmethyl Rosuvastatin is an active metabolite of the HMG-CoA reductase inhibitor rosuvastatin .1,2N-desmethyl Rosuvastatin is formed when rosuvastatin undergoes demethylation, primarily by the cytochrome P450 (CYP) isoform CYP2C9 and to a lesser extent by CYP2C19 and CYP3A4.1 1.Macwan, J.S., Ionita, I.A., and Akhlaghi, F.A simple assay for the simultaneous determination of rosuvastatin acid, rosuvastatin-5S-lactone, and N-desmethyl rosuvastatin in human plasma using liquid chromatography-tandem mass spectrometry (LC-MS/MS)Anal. Bioanal. Chem.402(3)1217-1227(2012) 2.Bai, X., Wang, X.P., He, G.D., et al.Simultaneous determination of rosuvastatin, rosuvastatin-5 S-lactone, and N-desmethyl rosuvastatin in human plasma by UPLC-MS/MS and its application to clinical studyDrug Res. (Stuttg.)68(6)328-334(2018)

Olmesartan medoxomil impurity C is an Olmesartan medoxomil impurity. Olmesartan medoxomil is a potent and selective angiotensin AT1 receptor inhibitor with IC50 of 66.2 μM. [1]. Senda A, et al. Effects of Angiotensin II Receptor Blockers on Metabolism of Arachidonic Acid via CYP2C8. Biol Pharm Bull. 2015;38(12):1975-9. [2]. Shah S, et al. Simultaneous Quantitative Analysis of Olmesartan Medoxomil and Amlodipine Besylate in Plasma by High-performance Liquid Chromatography Technique. J Young Pharm. 2012 Apr;4(2):88-94.

19-hydroxy Cholesterol 是一种氧甾醇，是毛细管气体色谱法定量测甾醇的内标，可促进动脉粥样硬化。大西洋鳕鱼片（Merluccius hubbsi）的冷冻储存和烧烤可促进19-Hydroxy cholesterol含量增加。

Methyl brevifolincarboxylate (Brevifolincarboxylic acid methyl ester) is a potent influenza virus PB2 cap-binding inhibitor. Methyl brevifolincarboxylate exhibits inhibitory activity against influenza virus A Puerto Rico 8 34 (H1N1) and A Aichi 2 68 (H3N2) with IC50s of 27.16 μM and 33.41 μM. Anti-oxidant activity[1][2]. Methyl brevifolincarboxylate exhibits significant DPPH radical scavenging activity with an IC50 value of 8.9 μM. [1]. Wu QY, et al. Chromatographic fingerprint and the simultaneous determination of five bioactive components of geranium carolinianum L. water extract by high performance liquid chromatography. Int J Mol Sci. 2011;12(12):8740-8749. [2]. Fang SH, et al. Anti-oxidant and inflammatory mediator's growth inhibitory effects of compounds isolated from Phyllanthus urinaria. J Ethnopharmacol. 2008;116(2):333-340.

N-3-hydroxydecanoyl-DL-Homoserine lactone is a bacterial quorum-sensing molecule.1It activates SdiA (EC50= 0.6 μM), a transcription factor that detects N-acyl homoserine lactones (AHLs), in the 14028 pJNS25 strain ofS. enterica.2 1.Fekete, A., Frommberger, M., Rothballer, M., et al.Identification of bacterial N-acylhomoserine lactones (AHLs) with a combination of ultra-performance liquid chromatography (UPLC), ultra-high-resolution mass spectrometry, and in-situ biosensorsAnal. Bioanal. Chem.387455-467(2007) 2.Janssens, J.C.A., Metzger, K., Daniels, R., et al.Synthesis of N-acyl homoserine lactone analogues reveals strong activators of SdiA, the Salmonella enterica serovar Typhimurium LuxR homologueAppl. Environ. Microb.73(2)535-544(2007)

5-hydroxy Flunixin is a metabolite of the COX inhibitor flunixin .1 1.Daeseleire, E., Mortier, L., De Ruyck, H., et al.Determination of flunixin and ketoprofen in milk by liquid chromatography-tandem mass spectrometryAnal. Chim. Acta488(1)25-34(2003)