“…The following were purchased from Sigma-Aldrich Co. (St. Louis, MO, USA): 3,4-Dihydroxybenzylaldehyde (1), caffeic acid (2), vanillin (3), p-coumaric acid (4), ferulic acid (5), isoferulic acid (6), benzoic acid (7), 3, 4-dimethoxy cinnamic acid (8), cinnamic acid (9), 4-methoxy cinnamic acid (10), quercetin (13), alpinetin (14), kaempferol (15), apigenin (17), isorhamnetin (18), pinocembrin (19), benzyl caffeate (20), chrysin (22), phenethyl caffeate (23), galangin (24), benzyl p-coumarate (25), benzyl ferulate (26), pinostrobin (28), tectochrysin (29), cinnamyl cinnamate (31), trolox (6-hydroxy-2,5,7,8-tetramethylchroman-2carboxylic acid), randomly methylated β-cyclodextrin (RMCD), fluorescein and 2,2 -Azobis-(2-amidinopropane) dihydrochloride (AAPH), luminol, pyrogallol, sodium bicarbonate, and sodium carbonate. Cinnamylideactic acid (16) was purchased from Funakoshi Chemical Co. (Tokyo, Japan), while 5-Methoxy pinobanksin (11), pinobanksin (12), pinobanksin-3-acetate (21), cinnamyl caffeate (27), cinnamyl p-cinnamate (30), and 4-methoxycinnamyl cinnamate (32) were collected by preparative HPLC.…”