The elemental composition of each polyphenol was determined
according to the accurate masses and isotopic pattern (through the
Formula Finder feature in Analyst QS 2.0) and searched for in the
Dictionary of Natural Products (Chapman & Hall/CRC), the MOTO
database (http://appliedbioinformatics.wur.nl/moto) and the Plant
Metabolic Network. Comparison of the observed MS/MS spectra
with those found in the literature was the main tool for putative
identification of polyphenols.