stability

(-)-Epigallocatechin-3-(3''-O-methyl) gallate ((-)-EGCG-3''-O-ME) 是从茶叶中分离出的一种天然产物，具有很强的抗氧化、细胞毒性和抗菌活性，可增强蚀刻漂洗粘合剂与牙本质的粘合稳定性。

Thiamine monophosphate chloride dihydrate (Aneurine monophosphate chloride) 是内源性代谢产物的一种。

trans-Urocanic Acid ((E)-Urocanic acid) 是一种主要分布于海马体和前额叶皮层的化合物，是顺式UCA的异构体，是表皮紫外线保护剂，可增强替诺福韦艾拉酚胺在长效HIV应用中的稳定性。trans-urocanic acid 可有效调节免疫功能，可在体外抑制人类自然杀伤细胞的活性，可用于研究阿尔茨海默病。

Caprylic Capric Triglyceride 是一种从分离的植物油中提取的甘油三酯和酯，以及从椰子油和棕榈仁油中提取的脂肪酸。它具有良好的氧化稳定性，可用作食品添加剂及用于化妆品。

L-Alanyl-L-glutamine (Ala-Gln) 是一种由丙氨酸和谷氨酰胺组成的二肽，对抗氧化系统有益，能够减轻炎症，并能够在分解代谢情况下调节热休克蛋白 (HSP) 的反应。

Rebaudioside D 是一种苷类化合物，存在于甜菊叶中，可用作甜味剂。

Spermidine (N-(3-Aminopropyl)-1,4-diaminobutane) 属于天然多胺，存在于核糖体和活组织中，在生物体内具有各种代谢功能。Spermidine 具有炎症减轻、调节脂质代谢、调节细胞生长和死亡的功能。

Citric acid monohydrate 是一种存在于柑橘类水果中的三羧酸。柠檬酸因其抗氧化特性而被用作药物制剂中的赋形剂。它保持活性成分的稳定性并用作防腐剂。

Antrodin A (camphorataanhydride A) 是固体发酵樟脑菌菌丝体的一种主要活性成分。它能够增强肝脏的抗炎及抗氧化能力，维持肠道菌群的稳定，避免酒精对肝脏的损伤。

Gamabufotalin (Gamabufagin) 是一种蟾蜍甾烯，存在于蟾酥中。它稳定性高，毒性低，被广泛用于癌症的研究。

p-Hydroxyphenethyl anisate (4-Hydroxyphenethylanisate) 是一种来自 Notopterygium forbe-siiBoiss 的天然产品，是一种新型聚合物缓释材料，与 AAPBA 嵌段共聚后， 制备的纳米颗粒具有良好的 Ph 敏感性、葡萄糖敏感性、胰岛素负载速率和稳定性。

5,15-Diacetyl-3-benzoyllathyrol (Euphorbia factor L3) 是一种具有抗癌作用的萜类化合物。

Spermidine trihydrochloride (4-Azaoctamethylenediamine trihydrochloride) 能够维持细胞膜稳定性，提高抗氧化酶特性，改善光系统 II (PSII) 以及相关基因表达，也能够显著抑制 H2O2和 O2.-含量。

EGCG Octaacetate 是表没食子儿茶素没食子酸酯的前药，对革兰氏阳性菌和革兰氏阴性菌有潜在抗菌可能。它可下调 PI3K Akt NFκB 磷酸化和 p65 乙酰化来降低促炎介质水平，减少小鼠结肠炎引起的结肠癌。

N4-Acetyl-2'-O-methylcytidine（ac4Cm）为嗜热古细菌中的 RNA，具备乙酰化及甲氧化的双重修饰特性。此化合物与古细菌在极端环境中的适应性存在相关性，其双重修饰作用有助于提升RNA的稳定性。

Taurohyodeoxycholic acid (THDCA) is a taurine-conjugated form of the secondary bile acid hyodeoxycholic acid .1THDCA decreases the size and weight of human gallstonesin vitro. It increases bile flow, biliary cholesterol secretion, and biliary lipid secretion in rats.2Co-administration of THDCA with taurochenodeoxycholic acid prevents TCDCA-induced hepatotoxicity, increasing bile flow as well as biliary acid and phospholipid secretion in rats.3THDCA also reduces myeloperoxidase activity, expression of TNF-α and IL-6, and colonic damage in a mouse model of TNBS-induced ulcerative colitis.4Taurohyodeoxycholic acid MaxSpec standard is a quantitative grade standard of taurohyodeoxycholic acid (sodium salt) that has been prepared specifically for mass spectrometry and related applications where quantitative reproducibility is required. The solution has been prepared gravimetrically and is supplied in a deactivated glass ampule sealed under argon. The concentration was verified by comparison to an independently prepared calibration standard. Verified concentration is provided on the certificate of analysis. This taurohyodeoxycholic acid MaxSpec standard is guaranteed to meet identity, purity, stability, and concentration specifications and is provided with a batch-specific certificate of analysis. Ongoing stability testing is performed to ensure the concentration remains accurate throughout the shelf life of the product.Note: The amount of solution added to the vial is in excess of the listed amount. Therefore, it is necessary to accurately measure volumes for preparation of calibration standards. Follow recommended storage and handling conditions to maintain product quality.

Nigerose，一种在Acremonium中发现的二糖，当与苷类化合物salidroside联合使用，浓度为150 µM时，可阻止HL-60细胞冷冻保存后的丙二醛（MDA）和活性氧物质（ROS）水平上升，并抑制乳酸脱氢酶（LDH）的释放。

Tricetin 7-O-glucoside (compound 33)为一种黄酮类单-O-糖苷。

(1S)-Calcitriol (1α,25-Dihydroxy-3-epi-vitamin-D3) is a natural metabolite of 1α,25-dihydroxyvitamin D3 (1α,25(OH)2D3). (1S)-Calcitriol exhibits potent vitamin D receptor (VDR)-mediated actions such as inhibition of keratinocyte growth or suppression of parathyroid hormone secretion[1]. 3‐epi‐Calcitroic acid is an end product of (1S)-Calcitriol (1α,25-Dihydroxy-3-epi-vitamin-D3; 3‐epi‐1a,25(OH)2D3) metabolism by rat CYP24A1[1]. [1]. Steve Y Rhieu, et al. Metabolic stability of 3-epi-1α,25-dihydroxyvitamin D3 over 1 α 25-dihydroxyvitamin D3: metabolism and molecular docking studies using rat CYP24A1. J Cell Biochem. 2013 Oct;114(10):2293-305.

DL-Glutamic acid, the conjugate acid of Glutamic acid, serves as a crucial metabolite. In comparison to the α and β polymorphs of L-Glutamic acid's second phase, DL-Glutamic acid exhibits enhanced stability[1].