Luotonin E is a heteroaromatic pyrroloquinazolinoquinoline alkaloid that, along with Luotonin A and B, was originally isolated from the Chinese medicinal plant Paganum nigellastrum. Luotonin compounds have antitumor activity and demonstrate cytotoxicity and inhibitory activity against human topoisomerase. For use as a topoisomerase inhibitor, a starting concentration of 25 μM is suggested. It is suggested that a dose-response curve be performed to find the inhibitor concentration most suitable for the intended assay.
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Luotonin E exhibited strong cytotoxic effects specifically on human leukemia P-388 cells. [1]
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Solubility is tested at 4 mg/mL in 4:1 solution of choloform and methanol. Solubility of luotonins in DMSO has been reported.
Two new synthetic analogues of luotonins A and F, 7-acetylaminoluotonin A (6) and 3-[3H(quinazolino-4-one)]quinoline (7) were synthesized. The new analogues, along with four natural quinazoline-quinoline alkaloids, luotonins A (1), B (2), E (3), F (4) and a synthetic deoxoluotonin F
Luotonins are alkaloids from the aerial parts of Peganum nigellastrum Bunge. that display three major skeleton types. Luotonins A, B, and E are pyrroloquinazolino-quinoline alkaloids, luotonins C and D are canthin-6-one alkaloids, and luotonin F is a 4(3H)-quinazolinone alkaloid. All
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