Naringenin-7-O-rutinoside

Figure 7.21 Green tomatoes contain the steroidal alkaloid tomatine. Levels decline in ripe fruit which contain the carotenoids lycopene, fS-carotene and lutein. Quercetin-3-O-rutinoside, naringenin and 5-O-caffeoylquinic acid are also present.

Among aglycones, the best known are naringenin and hesperidin. Their glycosylated forms occur commonly as O- or C-glycosides, usually as rutinosides (6-O-a-L-rhamnosyl-D-glucosides) and neohesperidosides (2-O-a-L-rhamnosyl-D-glucosides) attached at position 7. Flavanones contribute to the flavour of citrus [19]. Table 12 reports the structures of some common flavanones. 

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