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Eight new 4-phenylfuranocoumarins (1-8) have been isolated from the stem bark and the fruits of Calophyllum dispar, together with three known coumarins. The structures of 1-8 were established by means of spectroscopic analysis, including extensive 2D NMR studies. Some of these furanocoumarins exhibited significant cytotoxic activity against KB cells.

Four new xanthones, caledonixanthones A-D (1-4), were isolated from the trunk bark of Calophyllum caledonicum, in addition to 17 known compounds. The structures of 1-4 were determined by means of spectroscopic analysis and chemical derivatization.

From the EtOH extract of the stem bark of Mitrella kentii (Annonaceae), two new terpenylated dihydrochalcones were isolated, namely (−)-neolinderatin (1) and (−)-linderatin (2), together with known compounds 2‘,6‘-dihydroxy-4‘-methoxydihydrochalcone and (+)-catechin. Their structures were elucidated by means of combined analytical methods including HREIMS, DC, 1D, and 2D NMR spectroscopies.

Two new xanthones, 6-O-methyl-2-deprenylrheediaxanthone B (1) and vieillardixanthone (2), were isolated from the stem bark of Garcinia vieillardii, as were four known compounds (4-7). The structures of 1 and 2 were determined by means of spectroscopic analysis and chemical derivatization. Each isolate was tested for its antioxidant properties based on a scavenging activity study using the stable 1,1-diphenyl-2-picrylhydrazyl (DPPH) free radical.

The crinine-type alkaloids (+)-buphanisine and (−)-siculine have been obtained from Sternbergia sicula, while (−)-epimaritinamine and (−)-maritinamine were found in Sternbergia lutea

(−)-Siculinine was obtained from Turkish Sternbergia sicula. (−)-deacetyllutessine is shown to be identical with (−)-ungiminorine

Aristolochia elegans of Egyptian origin has yielded the new bisbenzylisoquinoline (―)-temuconine, which is enantiomeric with the previously described (+)-temuconine obtained from Chilean Berberis valdiviana