3 resultados
Two new curine-type bisbenzylisoquinoline alkaloids, wattisines A (1) and B (2) along with three known alkaloids were isolated from the roots of Cyclea wattii. Their structures were established by interpretation of NMR and high-resolution electrospray ionization (ESI)-MS data. Absolute configuration
Hepatocellular carcinoma(HCC) is one of the most common malignancies worldwide, however, drug resistance is still a tough problem of it. As in many other cancers, p53 mutations are commonly observed in HCCs (Hussain et al., 2007; Levine et al., 1994) [1,2]. Tumor tissues with mutant p53 seems to be
Continuing studies of the alkaloidal fraction from the roots of Cyclea barbata afforded two new bisbenzylisoquinoline alkaloids, namely, (-)-2'-norlimacine [1] and (+)-cycleabarbatine [2]. The known (+)-tetrandrine-2'-beta-N-oxide [3], for which the configuration of the N-oxide function is now