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Using the TLC cyclopeptide protosite detection method, a new cyclohexapeptide named rubipodanin B (1), together with 11 known Rubiaceae‐type cyclopeptides (RAs), RA‐X‐OMe (2), RA‐IV (3), RA‐XI (4), RA‐XIII‐OMe (5), rubiyunnanin C (6), RA‐I (7), RA‐III (8), RA‐V (9), RA‐VII (10), RA‐XII (11) and rubipodanin A (12), were obtained from the roots and rhizomes of Rubia podantha Diels. The structures were...
One new carbazole alkaloid, excavatine A (1), and two additional new alkaloids, excavatine B (2) and excavatine C (3), were isolated from the stems and leaves of Clausena excavataBurm.f. (Rutaceae). Their structures were determined on the basis of detailed spectroscopic analyses, especially 2D‐NMR and HR‐EI‐MS data. Compounds 1–3 were tested for their cytotoxic activities against A549, HeLa, and BGC‐823...
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