“…The addition of three molecules of malonyl-CoA to 4-coumaroylCoA leads to the synthesis of a bicyclic chalcone, such as naringenin chalcone, which is the precursor of flavanones, which in turn, are the precursors for all the rest of flavonoids. [48][49][50][51] The presence of different enzymes in plants such as isomerases, reductases, hydrolases and dioxygenases introduces modifications in the basic flavonoid structure, leading to the diverse flavonoids subclasses, 52 including: antoxanthins (flavones and flavonols), 45,[53][54][55][56][57] flavanones, 45,54,58,59 flavanonols, 60 isoflavonoides, 45,61,62 flavanols or catechins, 45,[63][64][65][66] anthocyanidins [67][68][69][70] and chalcones 59,71,72 (Figures 1-3). There are many examples of flavonoids found in plants with modifications in their structure, mainly as sugar O-conjugates in different positions.…”