trans-isomer

ISRIB (trans-isomer) 是一种 PERK 的高效抑制剂 (IC50=5 nM)，可以在 P-eIF2α 存在的情况下恢复蛋白质翻译并防止 SG 形成。

Menaquinone 4-d7 (Mixture of cis-trans isomers) 是 Menaquinone 4 (Mixture of cis-trans isomers) 的氘代化合物。

Tamoxifen Citrate 是一种口服有效的，选择性雌激素受体调节剂，可阻断乳腺细胞中的雌激素作用，并可激活如骨骼、肝脏和子宫细胞中的雌激素活性。它是 Hsp90激活剂，可增强 Hsp90 分子伴侣 ATPase 的活性，可激活自噬和诱导凋亡。

(E)-Cinnamamide (trans-Cinnamamide) 是 Cinnamamide 的活性较低的异构体，Cinnamamide 是一种有效的非致命化学驱虫剂，适用于减少鸟类害虫的损害。

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。

Elaidic acid (trans-Oleic Acid) 是在氢化植物油中发现的主要反式脂肪，能够被用作药物溶剂。在与花生四烯酸孵育的人类血小板中，反油酸抑制 HHT 和 HETE 的形成，同时诱导前列腺素和血栓素的合成。

trans-Doxercalciferol is an isomer of Doxercalciferol. Doxercalciferol is an activator of the Vitamin D receptor and prevents renal disease.

Zuclomiphene citrate is a cis isomer of Clomiphene citrate, and has an antiestrogenic effect and can inhibit the secretion of luteinizing hormone (LH) more than the trans isomer.

BChE-IN-35 (Azo-9) 作为一种BChE抑制剂，主要通过其顺式异构体优先与BChE结合的动态顺式 反式构象变化发挥作用。该化合物在阿尔茨海默病 (AD) 的研究中具有应用潜力。

Taclamine属于异喹啉衍生物，具有中枢神经系统抑制及抗炎作用。

HW 173 exhibits a specific affinity for sigma receptors. It is the (trans)-isomer.

Proparthrin, a trans isomer of the chrysanthemumate ester of primary alcohols, is an insectide

9(Z),11(E)-Conjugated linoleic acid is an isomer of linoleic acid that has been found in beef and milk fat.1It binds to peroxisome proliferator-activated receptor α (PPARα; IC50= 140 nM) and activates the receptor in a reporter assay using COS-1 cells expressing mouse PPARα when used at a concentration of 100 μM.29(Z),11(E)-Conjugated linoleic acid inhibits TNF-α-inducedGLUT4expression and increases insulin-stimulated glucose transport in 3T3-L1 adipocytes.3Dietary administration of 9(Z)11(E)-conjugated linoleic acid reduces serum fasting glucose, insulin, and triglyceride levels and decreases white adipose tissue macrophage infiltration inob obmice. It also increases body weight gain and body fat in weanling mice.4[Matreya, LLC. Catalog No. 1278] 1.Shultz, T.D., Chew, B.P., Seaman, W.R., et al.Inhibitory effect of conjugated dienoic derivatives of linoleic acid and β-carotene on the in vitro growth of human cancer cellsCancer Lett.63(2)125-133(1992) 2.Moya-Camarena, S.Y., Heuvel, J.P.V., Blanchard, S.G., et al.Conjugated linoleic acid is a potent naturally occurring ligand and activator of PPARαJ. Lipid Res.40(8)1426-1433(1999) 3.Moloney, F., Toomey, S., Noone, E., et al.Antidiabetic effects of cis-9, trans-11-conjugated linoleic acid may be mediated via anti-inflammatory effects in white adipose tissueDiabetes56(3)574-582(2007) 4.Pariza, M.W., Park, Y., and Cook, M.E.The biologically active isomers of conjugated linoleic acidProg. Lipid Res.40(4)283-298(2001)

Palmitoleic acid is a common constituent of the triglycerides of human adipose tissue. Palmitoleic acid-based diets raise low-density lipoprotein cholesterol and diminish high-density lipoprotein cholesterol, even when dietary intake of cholesterol is maintained at a low level. Palmitelaidic acid is the trans isomer of the 16:1 fatty acid palmitoleic acid. While its effects on cholesterol levels are poorly studied, palmitelaidic acid can have very different effects from those of palmitoleic acid on lipid metabolism and mobilization. Palmitelaidic acid methyl ester is an ester version of the free acid which may be more amenable for the formulation of fatty acid-containing diets and dietary supplements.

8(E),10(E),12(Z)-Octadecatrienoic acid is a conjugated polyunsaturated fatty acid (PUFA) that has been found inC. officinalisseed oil and has anticancer activity.1,2,3It inhibits the growth of Caco-2 cells when used at concentrations ranging from 10 to 50 μM.28(E),10(E),12(Z)-Octadecatrienoic acid (10 μM) induces formation of thiobarbituric acid reactive substances (TBARS) and apoptosis in DLD-1 colorectal adenocarcinoma cells.3It also inhibits prostaglandin biosynthesis in sheep vesicular gland microsomes (IC50= 31 μM).4 1.Crombie, L., and Holloway, S.J.The biosynthesis of calendic acid, octadeca-(8E,10E, 12Z)-trienoic, acid, by developing marigold seeds: origins of (E,E,Z) and (Z,E,Z) conjugated triene acids in higher plantsJ. Chem. Soc. Perk. T. 12425-2434(1985) 2.Yasui, Y., Hosokawa, M., Kohno, H., et al.Growth inhibition and apoptosis induction by all-trans-conjugated linolenic acids on human colon cancer cellsAnticancer Res.26(3A)1855-1860(2006) 3.Shinohara, N., Ito, J., Tsuduki, T., et al.Jacaric acid, a linolenic acid isomer with a conjugated triene system, reduces stearoyl-CoA desaturase expression in liver of miceJ. Oleo Sci.61(8)433-441(2012) 4.Nugteren, D.H., and Christ-Hazelhof, E.Naturally occurring conjugated octadecatrienoic acids are strong inhibitors of prostaglandin biosynthesisProstaglandins33(3)403-417(1987)

Latanoprost is an F-series prostaglandin analog which has been approved for use as an ocular hypotensive drug. 5-trans Latanoprost is an isomer of latanoprost wherein the double bond between carbons 5 and 6 has been changed from cis (Z) to trans (E). The trans isomer of latanoprost occurs as an impurity of between 2-5% in most commercial preparations of the bulk drug product. The present compound was prepared primarily as an analytical standard for detection and quantitation of this impurity. From what can be inferred from the study of other trans isomers of F-type prostaglandins, 5-trans latanoprost's biological activity is likely to be similar to that of the cis isomer. However, there are no specific published reports on the biological activity, and on the intraocular hypotensive activity in particular, of 5-trans latanoprost.

Latanoprost is an F-series prostaglandin (PG) analog which has been approved for use as an ocular hypotensive drug. Latanoprost is an isopropyl ester, a prodrug form which is converted to latanoprost (free acid) by endogenous esterase enzymes. The free acid form is 200 times more potent than latanoprost as a ligand for the human recombinant FP receptor. 5-trans Latanoprost (free acid) is an isomer of latanoprost (free acid) wherein the double bond between carbons 5 and 6 has been changed from cis (Z) to trans (E). The trans isomer of latanoprost occurs as an impurity in commercial preparations of the bulk drug product. The present compound was prepared primarily as an analytical standard for detection and quantitation of this impurity. From what can be inferred from the study of other trans isomers of F-type prostaglandins, the biological activity of this isomer is likely to be similar to that of the cis isomer. However, there are no specific published reports on the biological activity, and on reducing intraocular pressure in particular, of 5-trans latanoprost.

Cloprostenol is a synthetic derivative of prostaglandin F2α that is used in veterinary medicine as a luteolytic agent for the induction of estrus and in the treatment of reproductive disorders in cattle, swine, and horses. (+)-5-trans Cloprostenol is a minor impurity produced in the synthesis of (+)-cloprostenol. The (+)-5-trans isomer is 20-fold less active than the 5-cis form in terminating pregnancy in the hamster.

The lipoxins are trihydroxy fatty acids containing a 7,9,11,13-conjugated tetraene. Lipoxin A4 (LXA4) was first described as a metabolite of 15-HpETE and or 15-HETE when added in vitro to isolated human leukocytes. The material obtained in this manner consists of at least four distinct isomers: 5(S), 6(S); 5(S), 6(R); and the 11-trans and 11-cis isomers of each of these. 6(S)-LXA4 is one of the original four metabolites first identified by Serhan, Nicolaou, and Samuelsson. It was considered to be an artifact by these authors because it lacked the potency of the 5(S),6(R) isomer with respect to contraction of isolated guinea pig lung parenchymal strips. It has not been possible to isolate natural LXA4 from humans or other mammals in amounts sufficient for determination of absolute stereochemistry. Most authors refer to LXA4 as the 5(S)

11-trans Leukotriene C4 (11-trans LTC4) is a C-11 double bond isomer of LTC4. LTC4 undergoes slow temperature-dependent isomerization to 11-trans LTC4 during storage. 11-trans LTC4 is produced in smaller amounts relative to LTC4 in ionophore-stimulated HMC-1 cells (a human mast cell line) and equine eosinophils, but not in human neutrophils or RBL-1 cells. It is nearly equipotent with LTC4 for contraction of guinea pig parenchymal and ileum. In a radioligand binding assay using guinea pig ileum as a cysteinyl leukotriene receptor preparation, the pKis for LTC4 and 11-trans LTC4 were determined to be 6.42 and 6.58, respectively.

11-trans Leukotriene D4 (11-trans LTD4) is a C-11 double bond isomer of LTD4. LTD4 undergoes slow temperature-dependent isomerization to 11-trans LTD4 during storage. 11-trans LTD4 retains about 10-25 % of the potency for contraction of guinea pig ileum, trachea and parenchyma compared to LTD4. It exhibits an ED50 ranging between 12-60 nM for contraction of guinea pig trachea.

5(S),6(R)-11-trans DiHETE is a C-11 double bond isomer of 5(S),6(R)-DiHETE that is formed by the enzymatic isomerization of 5(S),6(R)-DiHETE by a membrane bound factor. 5(S),6(R)-11-trans DiHETE has been found in rat kidney homogenates and is potentially formed by the epoxide hydrolase pathway in this tissue. The isomerase activity responsible for the conversion of leukotriene B4 (LTB4) to 6-trans LTB4 in rat kidney homogenates has also been implicated in its formation. 5(S),6(R)-11-trans DiHETE is not a substrate for soybean lipoxygenase. The biological activity of 5(S),6(R)-11-trans DiHETE has not been reported.

Leukotriene B4 (LTB4) compounds are produced by both enzymatic and non-enzymatic processes. The products of enzymatic origin, via Leukotriene A4 (LTA4) hydrolase, are stereospecifically 12(R). Non-enzymatic hydrolysis products are 50:50 mixtures at C-12, but are almost exclusively trans at C-6. Thus, the non-enzymatic hydrolysis product of LTA4 is 6-trans-12-epi LTB4. 12-epi LTB4 is an isomer which would not be expected to occur in either non-enzymatic hydrolysis products, or in the enzymatic products of LTA4 hydrolase. Compared to LTB4, 12-epi LTB4 has significantly reduced activity for the LTB4 receptor on human neutrophils (IC50 of 7.5 mM), and on guinea pig lung membranes with a (Ki of 4.7 mM). 12-epi LTB4 is an weak agonist at both the recombinant human BLT1 and BLT2 receptors, requiring approximately 10 mM for full activation of the receptor.

9-cis-Vitamin A palmitate (9-cis-Retinyl palmitate) is a 9-cis isomer resulting from the interaction of vitamin A palmitate in corn flakes. It exhibits a biological activity of 26% compared to all-trans-vitamin A palmitate, which is known to be the most biologically active form of vitamin A.