Plumieride was isolated as one of the major components from the biologically active methanolic extract of the bark of Plumeria bicolor (family Apocynaceae). It possess antifungal and moderate cytotoxic effect, and demonstrates anti-malarial activity in vivo.

Corypalmine (or (-)-corypalmine) is an alkaloid which has been isolated from the crude base fraction of Corydalis chaerophylla and can inhibit prolyl oligopeptidase, an enzyme that hydrolyzes proline-containing peptides at the carboxy terminus of proline residues. It has been associated with schizophrenia, bipolar affective disorder, and related neuropsychiatric disorders and therefore may have important clinical implications.

Bergenin, isolated from Bergenia ligulata is a potent antioxidant and antilithiatic agent. Bergenin is an effective and broad-spectrum antifungal and antiviral Chinese medicine. Bergenin was reported to possess anti-microbial properties against filamentous fungi, yeast and HIV, but not against bacteria. Bergenin also exhibits anti-inflammatory activity through the inhibition of cyclo-oxygenase-2 or by means of affecting the Th1- or Th2-skewed cytokine production. Bergenin also exerts an anti-oxidant effect by scavenging free radicals, such as H, OH and CH3. In addition, bergenin was reported to possess hepatoprotective, neuroprotective and gastroprotective properties. R. aesculifolia Batal containing bergenin was used to treat protozoal infection and fever in rural China. Also was evaluated the antimalarial activity of bergenin in vitro and in vivo trials. Bergenin effectively inhibited Plasmodium falciparum growth in vitro (IC50, 14.1 µg̸ml, with ~100% inhibition at 50 µg/ml), without apparent cytotoxicity to erythrocytes or to mammalian HeLa and HepG2 cells. Bergenin exhibited less cytotoxic activity and the selectivity index (SI) was 887 and 1,355 for HeLa and HepG2 cells, respectively. The administration of bergenin to Plasmodium berghei infected mice for 6 days significantly inhibited the growth of the parasites. These findings provide evidence that bergenin may be a promising novel drug for antimalarial treatment. Antioxidant potential of bergenin was shown based on decreasing in lipid peroxides and increasing in superoxide dismutase (SOD) and catalase (CAT). Histopathological studies demonstrated the regenerative effect of bergenin on pancreatic β cells. Was shown, that bergenin isolated from C. digyna possesses significant antidiabetic, hypolipidemic and antioxidant activity in Type 2 diabetic rats.