Structure of the products of the metabolism of deoxypeganine and of deoxyvasicinone
The structures of the main components of the total metabolites of the anticholinesterase drug deoxypeganine (DOP) and its analog deoxyvasicinone (DOV) in the rat organism have been studied. The structures of two metabolites of DOP and DOV — 11α-hydroxydeoxyvasicinone and 2-(β-ethoxycarbonyl)ethyl-4-quinazoline — have been determined by the PMR method. On the basis of their structures and the results of measurements of the elementary compositions of ions, the fragmentation of the compounds has been elucidated. A minor component of the total metabolites has been isolated by chromato-mass spectrometry and for it the structure of 6-methoxydide-hydrovasicinone is proposed. A scheme of the metabolism of DOP and DOV has been put forward.
Anti-tumor alkaloids from Peganum harmala.
Six alkaloids peharmalines F-K, along with 14 known ones, were isolated from the aerial part of Peganum harmala L.. The structures of the isolated compounds were determined based on their HR-ESI-MS data, extensive NMR spectroscopic analyses, and ECD calculations. 3-(4-Hydroxyphenyl)quinoline exhibited potent antiproliferative activity against the HepG-2 cell lines with an IC50 value of 3.05 μM. Norharmane displayed a moderate inhibition against A549 and HepG-2 cells with IC50 values of 16.45 μM and 17.27 μM, respectively.
Progress on detection and analysis method of environmental endocrine disruptors
In this paper,the advances on detection and analysis methods of environmental endocrine disruptors were reviewed,which included the categories,pretreatment technique in different matrices and detection method etc,and the future′s prospects on the study of detection and analysis method were talked about also.