Others

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].

Cinolazepam is a benzodiazepine derivative drug.It has a powerful sedative effect, so it is mainly used as a hypnotic.

Desethoxy quetiapine, an active metabolite of the atypical antipsychotic quetiapine, primarily forms through the action of the cytochrome P450 (CYP) isoform CYP3A5. This compound binds to dopamine D2 receptors with an IC50 value of 1,330 nM. In vivo, desethoxy quetiapine at dosages of 20 and 40 mg/kg mitigates dopamine receptor agonist apomorphine-induced climbing behavior and ameliorates swimming deficits in mice, showcasing its potential modulatory effects on dopamine-mediated behaviors.

(3R,5R)-Rosuvastatin, a potential impurity detected in bulk rosuvastatin formulations, arises as a degradation product through various stresses including acid or base hydrolysis, thermal, photolytic, hydrolytic, oxidative stress, or during storage. This compound is associated with the HMG-CoA reductase inhibitor class to which rosuvastatin belongs.

Fasnall, a fatty acid synthase (FASN) inhibitor, exhibits an IC50 of 3.71 μM against the human recombinant enzyme. It halts tritiated acetate incorporation into lipids (IC50= 5.84 μM), boosts ceramide levels, and triggers lipid droplet formation in BT474 HER2+ breast cancer cells. Demonstrating antiproliferative effects on various breast cancer cell lines, including non-tumorigenic MCF-10A and tumorigenic MCF-7, MDA-MB-468, BT474, and SK-BR-3, its efficacy is directly linked to FASN expression in vitro. In murine models of HER2+ breast cancer, particularly the MMTV-Neu model, Fasnall significantly reduces tumor volume and extends survival. Furthermore, it enhances the efficacy of carboplatin in vivo, bolstering the objective response rate of stable disease from 25% with carboplatin alone to 88% when paired with Fasnall.

3-Deoxy-galactosone, a 1,2-dicarbonyl compound, originates from the degradation of galactose. It forms in food during Maillard and caramelization reactions.

Cytarabine 5′-monophosphate (ara-CMP), an active metabolite of the nucleoside analog cytarabine formed by deoxycytidine kinase, is incorporated into DNA by DNA polymerase α, significantly slowing DNA synthesis. It inhibits nuclear and mitochondrial DNA replication in S. cerevisiae at 15 mM and improves survival in an L1210 murine leukemia model at 3.5-75.1 mg/kg.

"1-O-Hexadecyl-2-eicosapentaenoyl-sn-glycero-3-PC is a compound that results from the incorporation of eicosapentaenoic acid (EPA) into lyso-PAF C-16, a process demonstrated in neutrophils from monkeys and humans consuming a diet rich in fish oils. Furthermore, it functions as a precursor for PAF C-16 synthesis via the remodeling pathway."

Heneicosapentaenoic Acid (HPA) is a fatty acid found in small amounts in Bryopsis pennata Lamouroux green algae and fish oils, with a structure similar to eicosapentaenoic acid (EPA), but with an additional carbon at the carboxyl end, resulting in the first double bond being in the Δ6 position. HPA is important for researching the impact of double bond positions in n-3 fatty acids, as it integrates into phospholipids and triacylglycerol in vivo as effectively as EPA and docosahexaenoic acid (DHA), while strongly inhibiting the synthesis of arachidonic acid from linoleic acid. Despite being a poor substrate for prostaglandin H (PGH) synthase and 5-lipoxygenase, HPA can rapidly deactivate PGH synthase. HPA methyl ester, in certain formulations, acts as a prodrug to enhance cellular uptake of HPA before being converted into free acid by esterases, and serves as a useful reference standard.

ABO acts as an annexin A7 modulator, specifically binding to Thr286 to inhibit its phosphorylation on threonine (not on serine or tyrosine) residues within human umbilical vein endothelial cells (HUVECs). This compound furthers the annexin A7 interaction with the EF-hand protein GCA, leading to reduced GCA phosphorylation, lowered intracellular calcium levels, and enhanced autophagy in COS-7 cells. Moreover, ABO lessens phosphorylation of the microtubule-associated protein 1 light chain (LC3) in HUVECs and impedes the upregulation of phosphatidylcholine-specific phospholipase C (PC-PLC) due to oxidized low-density lipoprotein in vascular endothelial cells (VECs). In animal models, specifically apoE-/- mice on a Western diet, administration of ABO (50 or 100 mg/kg per day) has been shown to decrease PC-PLC expression, promote autophagy, and reduce apoptosis, lipid accumulation, and the extent of atherosclerotic plaques in the aortic endothelium.

Tetranor-PGFM, the principal urinary metabolite of PGF2α, is excreted at rates of 7-13 µg per day in healthy females and 11-59 µg per 24 hours in healthy males. During pregnancy, female urinary levels of tetranor-PGFM increase 2 to 5-fold, returning to normal shortly after childbirth.

1,2,3-Tri-13(E)-docosenoyl glycerol, a triacylglycerol featuring 13(E)-docosenoic acid at the \(sn-1\), \(sn-2\), and \(sn-3\) positions, transiently elevates heart triglyceride levels in weanling rats when administered as 15% of a calcium-deficient diet, with levels returning to baseline after 28 days.

rel-HDMP 28 hydrochloride (Compound 2g) 为一种哌醋甲酯类似物，具有对SERT的选择性结合能力（Ki= 105 nM）。

1,3-Dieicosenoyl glycerol is a diacylglycerol featuring 11(Z)-eicosenoic acid at both the sn-1 and sn-3 positions.

"20α-Dihydro Prednisolone, a prednisolone metabolite, is detected in cattle urine post-adrenocorticotropic hormone (ACTH) administration but absent in both naturally stressed and non-stressed cattle."

Anhydroleucovorin是维生素B9（叶酸）的主要生物活性形式，在人体中有多种重要细胞功能，包括DNA合成、修复和甲基化，以及关键神经递质的产生。甲基四氢叶酸在再甲基化途径中通过将氨基酸同型半胱氨酸转化为蛋氨酸发挥关键代谢作用，是体循环中发现的主要叶酸形式，并被运输至组织供生理利用。

Prostaglandin H2 (PGH2), initially isolated from the incubation of arachidonic acid with ovine seminal vesicle microsomes, acts as a potent vasoconstrictor. It serves as the precursor for all 2-series prostaglandins (PGs) and thromboxanes (TXs). Moreover, as a TP receptor agonist, PGH2 irreversibly aggregates human platelets at concentrations of 50-100 ng/ml.

1,2-Dilauroyl-sn-glycero-3-phospho-(2R)-glycerol is a type of phosphoglycerol characterized by the presence of lauric acid at the sn-1 and sn-2 positions. [Matreya, LLC. Catalog No. 1443]

Spinosyn Aaglycone ((-)-Spinosyn A aglycon) 是杀虫剂Spinosyn A的未糖苷化形式，由Spinosyn A的两个糖基水解得到的酸性降解产物。

TID43，作为一种CK2抑制剂，其IC50值为0.3 μM。该化合物主要应用于抗血管生成研究领域。

ALLM (Calpain inhibitor II), a potent calpain and cathepsin protease inhibitor, not only prevents neuronal cell death but also enhances chronic neurological function following spinal cord injury (SCI)[1][2].

FTY720, an immune modulator, down-regulates sphingosine-1-phosphate (S1P) receptors, enhances the activity of sphingosine transporter Abcb1 and leukotriene C4 transporter Abcc1, and inhibits cytosolic phospholipase A2 activity. Its efficacy relies on in vivo phosphorylation by sphingosine kinases, resulting in FTY720-phosphate which also down-regulates S1P receptors. NBD-FTY720, a fluorescently-labeled analog of FTY720, retains the hydroxy methyl side chain targeted for phosphorylation, suggesting potential phosphorylation in vivo.

GGTI 2133, a peptidomimetic inhibitor of geranylgeranyl transferase type I (GGTase I; IC50= 38 nM), exhibits 140-fold selectivity towards GGTase I compared to farnesyltransferase (IC50= 5,400 nM). The compound effectively inhibits the geranylgeranylation of RAP1A (IC50= 10 µM) without affecting the farnesylation of H-Ras (IC50= >30 µM). Moreover, GGTI 2133 reduces the growth, migration, and invasion of oral squamous cell carcinoma (OSSC) cells to 75, 45, and 27% of control levels, respectively. When administered intraperitoneally at 5 mg/kg per day, it prevents eosinophil infiltration into the airways in a mouse model of allergic bronchial asthma, although it does not reduce chemokine levels. Additionally, GGTI 2133 thwarts naloxone-induced contraction of ileum in rats experiencing morphine withdrawal syndrome and mitigates the severity of withdrawal symptoms in vivo (ED50= 0.076 mg/kg).

3-Aminoisobutyric acid, a non-protein amino acid resultant from thymine catabolism, plays a significant role in metabolic activities. At a 5 µM concentration, it triggers browning in primary adipocytes, notably elevating uncoupling protein 1 (UCP-1) and CIDEA expression. Additionally, it boosts PPARα expression in both primary adipocytes and mouse inguinal white adipose tissue (WAT) in vivo, alongside enhancing β-oxidation in hepatocytes. Its plasma levels surge post-exercise in mice, and its administration at 100 mg/kg daily curtails weight gain and body fat without diminishing food consumption or hiking energy output, whilst ameliorating glucose tolerance. Notably, 3-aminoisobutyric acid concentrations are heightened in individuals with β-ureidopropionase deficiency, a genetic flaw impairing pyrimidine degradation, affecting plasma, urine, and cerebrospinal fluid.

Advanced glycation end products (AGEs) are compounds that are produced through non-enzymatic chemical reactions when sugars bond with proteins or lipids, occurring in conditions such as diabetes, uremia, aging, and rheumatic arthritis. A specific receptor, known as RAGE, interacts with select AGEs to trigger cell signaling. Pentosidine, a prominently studied natural AGE, serves as a common biomarker for assessing AGE production. Although pentosidine levels can be determined through urine analysis, it is predominantly broken down prior to excretion.

Leukotriene B4 (LTB4)-3-aminopropylamide is an analog of LTB4 that exhibits potent and selective binding to the BLT1 receptor with Ki values of 5.1 nM at BLT1 and 1,227 nM at BLT2, indicating its high affinity for BLT1 over BLT2. This compound's effects are mediated through interactions with two receptors, BLT1 and BLT2.

1-Palmitoyl-sn-glycerol 3-phosphate (1-P-GPA) 是内源性代谢物，常用于非酒精性脂肪性肝病的研究。

C32 Ceramide (d18:1/32:0) 是一种脂质分子，可用于生命科学相关研究，其 CAS 号为 34227-73-1。

α-Guaiene, a sesquiterpene identified in P. cablin, showcases its presence within this species.

Cannabipiperidiethanone, a synthetic cannabinoid structurally similar to JWH 250 and AM2233, has been detected in prohibited "herbal" blends in Japan. It exhibits affinity for CB1 and CB2 receptors with IC50 values of 591 nM and 968 nM, respectively. Compared to JWH 250, its affinities for CB1 and CB2 receptors are 2.3- and 9.4-fold lower, and 13- and 70-fold lower than (R)-(+)-WIN 55,212-2, respectively. Cannabipiperidiethanone is designated for forensic and research purposes only.

14-Pentadecenoic acid, a 15-carbon long-chain fatty acid with an alkene functional group on the terminal carbon of its aliphatic tail, has been observed to undergo oxidation due to the growth of M. cerificans at the expense of the parent alkene. This compound is utilized in the creation of fibrous scaffold biomaterials for tissue engineering purposes and in constructing metallomesogenic side-chain polymers for coating capillary columns in gas chromatography applications.

17-Hydroxyheptadecanoic acid, a hydroxylated fatty acid identified in aeolian particles from the Frioul Islands and the outer bark of E. globulus, serves in the synthesis of diverse macrocyclic lactones. [Matreya, LLC. Catalog No. 1760]

Cannabidiol hydroxyquinone (HU-331) is potentially an active metabolite of cannabidiol that could play a role in inducing apoptosis. It functions by inhibiting the ATPase activity of topoisomerase IIα through a noncompetitive mechanism.

1,3-Dioleoyl-2-octanoyl glycerol, a triacylglycerol, features oleic acid at the sn-1 and sn-3 positions and octanoic acid at the sn-2 position. Its utility lies in the characterization of R. oryzae lipase functionality, specifically for regiodistribution analysis of fats that comprise medium- and short-chain fatty acids.

BAI1 hydrochloride 是选择性凋亡因子BAX变构抑制剂，通过结合BAX并变构抑制其激活，显示出用于研究BAX依赖性细胞死亡介导疾病的潜力。