Figure 4.

Chemical structures of phenolic compounds identified in broccoli sprouts subjected to UVA or UVB radiation stress: Gallic acid hexoside I (1); gallotannic acid (2); p-hydroxybenzoic acid (3); gallic acid hexoside II (4); 4-O-caffeoylquinic acid (5); digalloyl hexoside (6); 3-O-hexoside kaempferol (7); 1-O-sinapoyl-β-d-glucose (9); sinapoyl malate (10); 1,2-diferulolylgentiobiose (11); 5-sinapoylquinic acid (12); sinapic acid (13); gallic acid (14); kaempferol 3-O-sinapoyl-sophoroside 7-O-glucoside (15); 1,2-disinapoylgentiobiose (16); 1-sinapoyl-2’-ferulolylgentiobiose (17); 1,2,2’-trisinapoylgentiobiose (18); 1,2-disinapoyl-1’-ferulolylgentiobiose (19); 1,2-disinapoyl-2-ferulolylgentiobiose (20); 1-sinapoyl-2,2’-diferulolylgentiobiose (21); (isomeric) 1,2,2’-trisinapoylgentiobiose (22).The numbering corresponds to the peak number assigned in Table 3.