labor

Valethamate bromide (Resitan) 是快速作用的抗胆碱能解痉和肌萎缩剂，是一种酯，能够改善宫颈扩张加速分娩。

SSR126768A 是一种新型且具有选择性、口服活性和有效性的催产素(OT)受体拮抗剂，对子宫收缩有抑制作用，可用于预防早产。

Camylofin HCl is an antispasmodic used in labor treatment and is also used to deliver drug therapy for ulcerative colinitis.

Dinoprost (Prostaglandin F2a) 是口服有效的、内源性的前列腺素 F 受体激动剂。它是在子宫内膜腔上皮和黄体中局部产生的溶酶激素。它在分娩过程中起关键作用。

Phencarbamide napadisilate 是一种在分娩期间使用的抗痉挛和抗胆碱能化合物。

Phencarbamide 是一种抗痉挛和抗胆碱能化合物，常用于分娩期间。该化合物直接作用于平滑肌。

Delprostenate is similar to PGF(2alpha), a naturally occurring prostaglandin used in medical labor induction and abortion drugs.

15(S)-15-methyl Prostaglandin F2α (15(S)-15-methyl PGF2α) has been shown to have potent uterine stimulant and abortifacient properties when administered intramuscularly to induce labor. 15(S)-15-methyl PGF2α isopropyl ester is a lipophilic analog of 15(S)-15-methyl PGF2α methyl ester, which may be hydrolyzed in vivo to the fully active free acid.

5β-Dihydroprogesterone (5β-DHP) is a progesterone receptor agonist and metabolite of progesterone .1,2It is formed from progesterone by 5β-reductase.25β-DHP inhibits spontaneous contractions in isolated rat uterus when used at a concentration of 10 μg ml, an effect that can be blocked by the progesterone receptor antagonist RU486 but not the GABAAreceptor antagonist picrotoxin .1It is a negative modulator of homooligomeric Ρ1 subunit-containing GABAAreceptors, inhibiting GABA-induced currents inX. laevisoocytes expressing these receptors (IC50= 5.02 μM).3Plasma levels of 5β-DHP decrease at the onset of spontaneous human labor.4

Dinoprost tromethamine salt (PGF2α THAM) 是一种口服有效的前列腺素 F 受体激动剂。它是在子宫内膜腔上皮和黄体中局部产生的溶酶激素，在分娩过程中起关键作用。

Atosiban (RW22164) 是一种脱氨基催产素类似物，是一种九肽，也是竞争性的催产素受体拮抗剂。它是一种宫缩抑制剂，可用于自发早产的研究。

Oxytocin (Oxytocin (Syntocinon)) 是哺乳动物的神经垂体激素，是多效的下丘脑肽，是催产素受体的配体，有助于分娩、哺乳和亲社会行为。Oxytocin 有刺激乳腺分泌乳汁，在分娩过程中促进子宫平滑肌的收缩，促进母爱的作用。

Atosiban acetate (RW22164) 是一种脱氨基催产素类似物，是一种九肽，也是竞争性的催产素受体拮抗剂。它是一种宫缩抑制剂，可用于自发早产的研究。

Ritodrine (DU21220) 是一种β 肾上腺素能激动剂，也是一种有效的子宫松弛剂。Ritodrine 可用于阻止早产相关的研究。

Isoxsuprine Free Base is a beta-adrenergic agonist that causes direct relaxation of uterine and vascular smooth muscle. Its vasodilating actions are greater on the arteries supplying skeletal muscle than on those supplying skin. It is used in the treatment of peripheral vascular disease and in premature labor.

Ebopiprant, also known as OBE-022, is an Oral and Selective Prostaglandin F 2α Receptor Antagonist as an Effective and Safe Modality for the Treatment of Preterm Labor. OBE022 exhibits potent tocolytic effects on human tissues ex vivo and animal models in vivo without causing the adverse fetal side effects seen with indomethacin.

Erlosiban, also known as OBE001, is a novel, orally active nonpeptide oxytocin receptor antagonist under development for the treatment of preterm labor and improvement in embryo implantation and pregnancy rate in assisted reproductive technology (ART).

11,12-DiHETrE，一种细胞色素P450 (P450) 类二十烷素内源性代谢产物，用于早产研究，并可作为区分NAFL(非酒精性脂肪肝)与NASH(非酒精性脂肪性肝炎)的生物标志物。

Demoxytocin为一种异源性环肽，属于催产素类似物。其通过影响细胞膜通透性，提升平滑肌细胞内钙离子含量，进而加强平滑肌细胞收缩力，具备刺激子宫平滑肌收缩的能力，发挥催产素功能。此外，Demoxytocin在研究早产破裂引发的分娩刺激中有应用。

PDC31 (THG113.31; ILGHXDYK) 是FPProstaglandin Receptor 的变构和非竞争性抑制剂。PDC31是基于D-氨基酸的寡肽，用作平滑肌收缩剂。PDC31 在体内降低子宫收缩的强度和持续时间，可用于早产和原发性痛经 (PD) 的研究。PDC31 还增强人子宫肌层细胞中 Ca2+依赖性大电导 K+通道。

RYTVELA TFA (H-Arg-Tyr-Thr-Val-Glu-Leu-Ala-OH) 是一种非竞争性变构白细胞介素-1受体抑制剂，具有抗炎活性，抑制炎症上调和子宫活化，可用于预防早产和胎儿保护。

13,14-dihydro-15-keto Prostaglandin E2 (13,14-dihydro-15-keto PGE2) serves as the predominant metabolite of PGE2 in plasma, created through a 15-keto PGE2 intermediate by the action of 15-oxo-PG Δ13 reductase. Unlike its precursor PGE2, this compound exhibits poor binding affinity towards EP2 and EP4 PGE2 receptors (Ki values of 12 and 57 µM, respectively) in CHO cells and fails to stimulate adenylate cyclase activity therein (EC50s >18 and >38 µM, respectively). Concentrations of 13,14-dihydro-15-keto PGE2 are notably higher in the plasma of pregnant women during their third trimester and at labor and delivery stages, whereas its levels are found to be reduced in the tumor tissues of patients with non-small cell lung cancer (NSCLC) compared to adjacent healthy tissue.