skeleton

Usnic Acid (Usniacin) 是地衣次生代谢产物，具有独特的二苯并呋喃骨架。它是一种抗菌剂、抗肿瘤剂和酶抑制剂。

2-Ketoglutaric acid 是 Krebs 循环的中间体，可以产生 ATP 或 GTP 。2-Ketoglutaric acid 还充当氮同化反应的主要碳骨架。2-Ketoglutaric acid 是酪氨酸酶(tyrosinase)的可逆抑制剂 (IC50=15 mM)。

2-Ketoglutaric acid Sodium (AKG) 是一种三羧酸循环的中间产物，它可以由谷氨酸通过谷氨酸脱氢酶氧化脱氨产生，也可以作为磷酸吡哆醛依赖的转氨化反应的产物(由支链氨基酸转氨酶介导)，其中谷氨酸是常见的氨基供体。

Bohemine 是一种合成的选择性CDK 抑制剂，是嘌呤类似物，具有抗癌活性。它对Cdk2 cyclin E、Cdk2 cyclin A 和Cdk9 cyclin T1的IC50分别为 4.6 μM、83 μM 和 2.7 μM。

Batabulin (T138067) 是一种抗肿瘤剂，可与 β-微管蛋白同种型的子集共价且选择性地结合，从而破坏微管聚合。它影响细胞形态并导致细胞周期停滞，最终诱导细胞凋亡。

Tyrphostin AG957 是一种酪氨酸激酶抑制剂，具有抗BCR ABL 酪氨酸激酶活性。它能够抑制p210bcr abl 酶活性 (IC50:2.9 μM)。

Estramustine phosphate sodium (Ro 21-8837 001) 是雌二醇类似物，是一种具有口服活性抗微管化疗剂，通过与微管相关蛋白和微管蛋白结合而使微管解聚。它可诱导前列腺癌细胞凋亡，可研究前列腺癌。

2-Methyl-2H-indazole-3-carboxylic acid可以被用作潜在的活性分子骨架，用于设计和合成具有生物活性的化合物。

Chelidamic acid 是一种有效的谷氨酸脱羧酶抑制剂(Ki:33 μM)，也是含有吡喃骨架的杂环有机酸，与金属离子有良好的配位能力。

Collagen, Type I, from bovine achilles tendon 是从牛跟腱中提取的 I 型胶原蛋白，广泛存在于海洋无脊椎动物组织中。Collagen, Type I, from bovine achilles tendon 是组成真皮中胶原纤维的唯一成分，在骨骼与结缔组织中发挥作用的主要方式是形成和保持骨架的完整性。

Deprodone propionate, a corticosteroid, is synthesized by esterification with propionic acid at the 17-position and deoxidation at the 21-position of the prednisolone skeleton.

CP-8668 is an orally active nonsteroidal progesterone receptor modulator with tetrahydrobenzoindolone skeleton.

Dihydroisoalantolactone is found in herbs and spices. Dihydroisoalantolactone is isolated from roots of Inula helenium (elecampane). This compound Aliphatic heteropolycyclic, belongs to the class of organic compounds known as eudesmanolides, secoeudesmano

Ursonic Acid (TOS-BB-0966) 是一种天然三萜酸，属于熊果烷三萜类，其结构基于五环熊果烷骨架。 它具有作为 HIV-1 蛋白酶抑制剂的潜力。

Rubrolone is a natural tropolonoid with a unique carbon skeleton.

WZ4002-hydroxyl is a WZ4002 derivative or WZ4002 analogue in which methoxy is replaced by hydroxyl and can be detected in 50% of patients with clinical resistance to gefitinib or erlotinib. WZ4002 has a basic chemical skeleton (covalent pyrimidine) that d

Cho-Arg is a steroid-based cationic lipid that contains a cholesterol skeleton coupled to an L-arginine head group. It forms a complex with plasmid DNA and decreases plasmid DNA migration in an agarose-gel retardant assay at charge ratios greater than or equal to 4. Cho-Arg facilitates transfection of plasmid DNA into H1299 and HeLa cells in the presence or absence of fetal bovine serum, an effect that is reversed by the lipid raft-mediated endocytosis inhibitor methyl-β-cyclodextrin and the caveolae-mediated endocytosis inhibitor genistein . It is cytotoxic to H1299 cells (IC50 = 88.5 μg/ml).

Dios-Arg is a steroid-based cationic lipid that contains a diosgenin skeleton coupled to an L-arginine head group. It forms a complex with plasmid DNA and decreases plasmid DNA migration in an agarose-gel retardant assay at charge ratio greater than or equal to 4. Dios-Arg facilitates transfection of plasmid DNA into H1299 and HeLa cells in the presence and absence of fetal bovine serum, an effect that is reversed by the lipid raft-mediated endocytosis inhibitor methyl-β-cyclodextrin and the caveolae-mediated endocytosis inhibitor genistein . It has been used, coupled to 1,2-dioleoyl-sn-glycero-3-PE , to bind siRNA and plasmid DNA to form cationic lipid nanoparticles for intracellular transport. Dios-Arg is cytotoxic to H1299 and HeLa cells (IC50s = 83.5 and 74.1 μg/ml, respectively).

2H-Cho-Arg is a steroid-based cationic lipid that contains a 2H-cholesterol skeleton coupled to an L-arginine head group and can be used to facilitate gene transfection. It forms a complex with plasmid DNA (pDNA) and decreases pDNA migration in an electrophoretic mobility shift assay at +/- charge ratios of 4 or higher. 2H-Cho-Arg facilitates transfection of a luciferase gene into H1299 cells, an effect that is reversed by the lipid raft-mediated endocytosis inhibitor methyl-β-cyclodextrin and the caveolae-mediated endocytosis inhibitor genistein , but not by inhibitors of clathrin- or micropinocytosis-mediated endocytosis. It induces cytotoxicity in H1299 cells (IC50 = 92.7 μg/ml).

IT-143B is a bacterial metabolite that has been found in S. iakyrus.1 It inhibits the proliferation of OS-RC-2 and ACHN cancer cells (IC50s = 22 and 98 μM, respectively). |1. Li, K., Liang, Z., Chen, W., et al. Iakyricidins A-D, antiproliferative piericidin analogues bearing a carbonyl group or cyclic skeleton from Streptomyces iakyrus SCSIO NS104. J. Org. Chem. 84(19), 12626-12631 (2019).

(2α,3β)-Olean-12-ene-2,3-diol (Compound 3) is a triterpenoid compound that possesses a lupane, oleanane, and ursane skeleton.

Angulatin G (Celangulatin E) 是一种具有 β-二氢琼脂糖呋喃倍半萜骨架的杀虫倍半萜多元醇酯，可从Celastrusangulatus 根皮中分离得到。 Angulatin G 对Mythimna separata 显示LD50为 1656.4 μg mL。

Ganorbiformin B是一种具有与灵芝酸相同羊毛甾烷骨架的羊毛甾烷三萜类化合物。其C-3差向异构体灵芝酸T对结核分枝杆菌H37Ra显示出强抗分枝杆菌活性。

Hosenkoside L是一种从植物中提取的糖苷。