APIs for research and impurities

2-Acetamido-9-[2-(acetyloxy)ethoxy]methyl-6,9-dihydro-1H-purin-6-one (ademetionine) is a prodrug that is metabolized in the liver to form ademetionine. Ademetionine is a potent inhibitor of guanosine deaminase, which is an enzyme that breaks down guanosine into guanine and ammonia. Ademetionine has shown efficacy in cancer treatment and may also be used to treat tuberculosis. The metabolism of this drug takes place in the liver, where it undergoes oxidation by cytochrome P450 enzymes to form the active metabolite ademetionine. Metabolism of this drug can be inhibited by drugs such as trifluoromethanesulfonic acid (TFMS), which are used for the treatment of malaria. TFMS inhibits the formation of ademetionine but does not affect the formation

Gentamicin B1 is a gentamicin antibiotic that is used to treat skin cancer. It inhibits bacterial growth by binding to the 50S ribosomal subunit and blocking protein synthesis. Gentamicin B1 has shown clinical response in patients with wild-type strains of Streptococcus faecalis, but not in those with a mutant strain. The mechanism of action for this drug may involve its ability to inhibit epidermal growth factor (EGF) production. Gentamicin B1 also has been shown to inhibit the proliferation of human cancer cells and induce apoptosis in some tumor cells.

Applications Naturally occurring flavonic glycoside; rhamnoglycoside of Diosmetin. Capillary protectant. References Damon, M., et al.: Arzneim.-Forsch., 37, 1149 (1987), Laurent, R., et al.: Int. Angiol., 7, 39 (1988), Tajana, A., et al.: Minerva Med., 79, 387 (1988),