Dehydrovomifoliol

Chemometrics as a tool of origin determination of Polish monofloral and multifloral honeys.[Pubmed:24641200]

J Agric Food Chem. 2014 Apr 2;62(13):2973-81.

The aim of this study was to evaluate the application of chemometrics studies to determine the botanical origin of Polish monofloral honeys using NMR spectroscopy. Aqueous extracts of six kinds of honeys, namely, heather (Calluna vulgaris L.), buckwheat (Fagopyrum esculentum L), lime (Tilia L), rape (Brassica napus L. var. napus), acacia (Acacia Mill.), and multifloral ones, were analyzed. Multivariate chemometric data analysis was performed using principal component analysis (PCA) and orthogonal partial least-squares discriminant analysis (OPLS-DA). Chemometric analysis supported by pollen analysis revealed the incorrect classification of acacia honeys by the producers. Characteristic motives for each honey were identified, which allowed chemical profiles of tested honeys to be built. Thus, phenylacetic acid and Dehydrovomifoliol (4-hydroxy-4-[3-oxo-1-butenyl]-3,5,5-trimethylcyclohex-2-en-1-one) were proposed to be markers of Polish heather honey. Formic acid and tyrosine were found to be the most characteristic compounds of buckwheat honey, whereas 4-(1-hydroxy-1-methylethyl)cyclohexane-1,3-dienecarboxylic acid was confirmed as a marker of lime honey.

Two new sesquiterpenoids from Solanum lyratum with cytotoxic activities.[Pubmed:19336938]

Chem Pharm Bull (Tokyo). 2009 Apr;57(4):408-10.

Two new sesquiterpenoids, lyratol C (1) and lyratol D (2), together with two known sesquiterpenoids, Dehydrovomifoliol (3) and blumenol A (4), were isolated from the whole plant of Solanum lyratum. Their structures were established by spectroscopic analyses. In vitro, the four compounds showed significant cytotoxic activities against three human cancer cell lines, namely, HONE-1 nasopharyngeal, KB oral epidermoid carcinoma, and HT29 colorectal carcinoma cells, and gave IC(50) values in the range 3.7-8.1 microM.

Anticholinesterase and antioxidant constituents from Gloiopeltis furcata.[Pubmed:20823607]

Chem Pharm Bull (Tokyo). 2010 Sep;58(9):1236-9.

Activity-directed isolation of the ethyl acetate, methylene chloride and n-hexane fractions of Gloiopeltis furcata resulted in the isolation of 18 compounds. Their structures were elucidated as 2-(3-hydroxy-5-oxotetrahydrofuran-3-yl)acetic acid (1), glutaric acid (2), succinic acid (3), nicotinic acid (4), (E)-4-hydroxyhex-2-enoic acid (5), cholesterol (6), 7-hydroxycholesterol (7), uridine (8), glycerol (9), 5-(hydroxymethyl)-2-methoxybenzene-1,3-diol (10), (5E,7E)-9-oxodeca-5,7-dienoic acid (11), (Z)-3-ethylidene-4-methylpyrrolidine-2,5-dione (12), Dehydrovomifoliol (13), loliolide (14), cholesteryl stearate (15), palmitic acid (16), cis-5,8,11,14,17-eicosapentaenoic acid (17) and alpha-linolenic acid (18) on the basis of spectroscopic and chemical evidences. Their anticholinesterase and antioxidant activities were evaluated via inhibitory activities on acetylcholinesterase (AChE) and butyrylcholinesterase (BChE) as well as scavenging activities on 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical and peroxynitrite (ONOO(-)). All isolated compounds (1-18) exhibited moderate AChE inhibitory activities with IC(50) values ranging from 1.14-12.50 microg/ml, whereas 1, 7, 9, 17, and 18 showed mild BChE inhibitory activities with IC(50) values ranging from 5.57-15.89 microg/ml. Although most of the compounds isolated were lacking the scavenging activity on DPPH radical and ONOO(-), 5 and 10 showed good DPPH radical scavenging activity, and 5, 10, and 16 showed potent ONOO(-) scavenging activity.