Aristolone

Nat Prod Commun. 2013 Mar;8(3):287-8.

New bioactive secondary metabolites from Bornean red alga, Laurencia similis (Ceramiales).[Pubmed: 23678792]

METHODS AND RESULTS:
A Bomean red algal population of Laurencia similis Nam et Saito was analyzed for its secondary metabolite composition. Seven compounds were identified: ent-1(10)-aristolen-9beta-ol (1), ( )-Aristolone (2), axinysone B (3), 9-aristolen-1alpha-ol (4), 2,3,5,6-tetrabromoindole (5), 1-methyl-2,3,5,6-tetrabromoindole (6), and 1-methyl-2,3,5-tribromoindole (7). Compound 1 was identified as a new optical isomer of 1(10)-aristolen-9beta-ol.
CONCLUSIONS:
Compounds 1, 4 and 5 exhibited good antibacterial activity against antibiotic resistant clinical bacteria and cytotoxic effects against selected cancer cell lines.

Nat Prod Commun. 2015 Feb;10(2):367-8.

Chemical constituents of essential oils from the leaves, stems, roots and fruits of Alpinia polyantha.[Pubmed: 25920286]

The essential oils obtained from the leaves, stems, roots and fruits of Alpinia polyantha D. Fang (Zingiberaceae) have been studied.
METHODS AND RESULTS:
The leaf oil was comprised mainly of camphor (16.1%), α-pinene (15.2%) and β-agarofuran (12.9%), while the major constituents of the stem oil were α-pinene (12.4%), β-cubebene (10.6%), β-agarofuran (10.3%) and globulol (8.8%). However, β-cubebene (12.6%), fenchyl acetate (10.8%), β-maaliene (9.0%), Aristolone (8.8%) and α-pinene (8.2%) were the compounds occurring in higher amounts in the root oil. The quantitatively significant compounds of the fruit oil were δ-cadinene (10.9%), β-caryophyllene (9.1%), β-pinene (8.7%) and α-muurolene (7.7%).