neomycin b

Framycetin sulfate (Neomycin Sulphate B) 是一种氨基糖苷类抗生素，是 RNase P 裂解活性抑制剂，Ki 为 35 μM。它抑制锤头状核酶，Ki 值为 13.5 μM，可用于肝性脑病和肠致病性大肠杆菌感染的研究。

Framycetin is an aminoglycoside antibiotic and it also inhibits hammerhead ribozyme (Ki: 13.5 μM).

6 '-Deamino-6 '-hydroxyneomycin B 是一种氨基糖基抗生素，由Streptomyces fradiae UC 75 产生，对革兰氏阳性和革兰氏阴性细菌具有活性。6 '-Deamino-6 '-hydroxyneomycin B 可作为新霉素生物合成的中间体。

Neomycin (free base) is an antibiotic complex produced by Streptomyces fradiae. It is composed of neomycins A, B, and C. It acts by inhibiting translation during protein synthesis.

Paromomycin (Sulfate Salt) is an aminoglycoside that is active against Gram-negative and many Gram-positive bacteria as well as some protozoa and cestodes. Paromomycin in combination with sodium stibogluconate has proven to be effective in African and Indian VL (visceral leishmaniasis) and improves survival in African VL[3]. PS (Paromomycin Sulfate) is effective for elimination of B. coli without hematological side effects[4]. The activity of phosphoglucose isomerase was slightly inhibited by 10(-3) M paromomycin sulfate while those of hexokinase, phosphofructokinase and glucose-6-phosphate dehydrogenase were not inhibited[5]. In addition, with regard to correlation of endotoxemia with renal impairment, endogenous creatinine clearance and p-aminohippurate clearance were significantly improved (P less than 0.02) in those patients whose endotoxemia disappeared on paromomycin sulfate administration. Paromomycin sulfate seems to be effective in the prevention of endotoxemia and the associated renal impairment in cirrhosis in man[6]. Significantly higher frequencies of resistance to paromomycin, kanamycin, neomycin and tobramycin were observed in S. aureus isolates from PS (paromomycin supplemented) birds. Paromomycin supplementation resulted in resistance to aminoglycosides in bacteria of PS turkeys. Co-selection for resistance to other antimicrobial agents was observed in E. coli isolates[7].

Neomycin C是新霉素复合物中的两个主要活性异构体之一，为含2-DOS的氨基糖苷复合物，包括neomycin A，neomycin B以及neomycin C。其活性仅为Neomycin B的一半。

Senfolomycin B 对于革兰氏阳性菌和分枝杆菌表现出抗菌活性，并且对耐青霉素、链霉素、新霉素、大环内酯类抗生素的金黄色葡萄球菌也有效。Senfolomycin A 对于革兰氏阴性菌也具有较弱的抗菌作用。

Paulomycin B 显示对抗革兰氏阳性菌的活性，能够抑制抵抗青霉素、链霉素、新霉素以及大环内酯类抗生素的金黄色葡萄球菌。