Napyradiomycin A1is a fungal metabolite originally isolated fromC. rubraand has diverse biological activities.1,2It is active againstS. aureus,M. luteus,B. anthracis,C. bovis, andM. smegmatis(MICs = 1.56-12.5 μg/ml).1Napyradiomycin A1is an estrogen receptor antagonist (IC50= 4.2 μM in rat uterine homogenates).2It also inhibits mitochondrial NADH:ubiquinone oxidoreductase (complex I) and succinate:ubiquinone oxidoreductase (complex II) activities in bovine heart homogenates (IC50s = 20 and 9.7 μM, respectively).3
1.Shiomi, K., Iinuma, H., Hamada, M., et al.Novel antibiotics napyradiomycins. Production, isolation, physico-chemical properties and biological activityJ. Antibiot. (Tokyo)39(4)487-493(1986) 2.Hori, Y., Abe, Y., Shigematsu, N., et al.Napyradiomycins A and B1: Non-steroidal estrogen-receptor antagonists produced by a StreptomycesJ. Antibiot. (Tokyo)46(12)1890-1893(1993) 3.Yamamoto, K., Tashiro, E., Motohashi, K., et al.Napyradiomycin A1, an inhibitor of mitochondrial complexes I and IIJ. Antibiot. (Tokyo)65(4)211-214(2012)
Etoposide (Standard) 是一种可用于分析的标准物质,通常用作 Etoposide 的研究和分析中参考的标准样品。Etoposide (VP-16-213) 是一种拓扑异构酶 II 的抑制剂,通过与拓扑异构酶 II 和 DNA 形成复合物来抑制 DNA 合成 (IC50=60.3 μM)。Etoposide 具有抗肿瘤活性,可以诱导细胞凋亡、自噬。
Harzianopyridone is an atpenin-like compound that functions as an inhibitor of mammalian and nematode mitochondrial complex II, also known as succinate:ubiquinone oxidoreductase (SQR), demonstrating IC50 values of 0.017, 0.2, and 2 μM against bovine, rat, and nematode complex II, respectively. Additionally, it inhibits nematode quinol-fumarate reductase (QFR) with an IC50 value of 0.36 μM. Significantly selective for complex II over complexes I and III in rats and cattle, as well as complex I in nematodes, with IC50 values exceeding 100 μM, it exhibits notable antibacterial and antifungal properties, with EC50 values of 35.9, 42.2, 60.4, and 50.2 μg/ml against R. solani, S. rolfsii, M. phaseolina, and F. oxysporum, respectively.