2.2. Combined biosynthetic pathways
The contents of total anthocyanins and flavonoids in skin and pulp from commercial varieties of figs with different colour (black, red, yellow and green) have been analysed by Solomon et al. (2006) and then by Dueñas et al. (2008), which characterised qualitative and quantitative pigment composition of different Iberian commercial fig varieties, both in skin and in pulp. They detected fifteen anthocyanin pigments, most of them containing cyanidin as aglycone and also pelargonidin derivatives were found. Rutinose and glucose were present as substituting sugars, as well as acylation with malonic acid. Minor levels of peonidin 3-rutinose in pulp were also detected. In addition, they reported the detection of 5-carboxypyranocyanidin-3-rutinoside, a cyanidin 3-rutinose dimer and five condensed pigments containing C–C linked anthocyanins and flavanol (catechin and epicatechin) residues (Dueñas et al., 2008) (Table 1, Fig. 2).