Plant Polyphenols: Extraction, Structural Characterization, Hemisynthesis and Antioxidant Properties

Quantitative and Qualitative Analysis of Flavonoids and Phenolic Acids in Snow Chrysanthemum (Coreopsis tinctoria Nutt.) by HPLC-DAD and UPLC-ESI-QTOF-MS

“…Likewise, the fragment ion at m/z 151.0042 was produced by the characteristic RDA cleavage and neutral loss of C 8 H 6 O from the fragment ion at m/z 269.0334. Therefore, peak 7 was tentatively identified as luteolin 7- O -β- d -sophoroside [22]. Similarly, peak 10 exhibited an ion [M − H] − at m/z 433.1135 (C 21 H 22 O 10 ), which produced a major fragment ion at m/z 271.0605 by loss of glucose, indicating the presence of a glucose unit in its structure.…”

Polyphenolic Compounds Targeting p53-Family Tumor Suppressors: Current Progress and Challenges

“…Then the molecular mechanisms involved in tumor suppressors (mainly p53 and p73) expression by polyphenols will be discussed with a specific focus on the role of oxidative stress which is believed to be a key element in polyphenols-induced cancer cells death. phenolic products currently constitute a large and still expanding complex and heterogeneous family of molecules (more than 8000 phenolic structures currently known) with a great diversity of structure and size ranging from the low molecular weight simple phenols up to the high molecular weight tannins [1][2][3]. Polyphenols are also one of the largest and most widespread classes of constituents present in plant kingdom and more particularly in plantderived foods and beverages giving them their color and taste properties.…”