Table 1.

¹H and ¹³C-NMR data of quercetagetin (2) and patuletin (3) (ppm).

2 a			3
				Measured b		Literature c
Position	δc (J in Hz)	δH (J in Hz)	Position	δc (J in Hz)	δH (J in Hz)	δc (J in Hz)	δH (J in Hz)
4	175.84		4	177.58		177.86
5	153.58		9	158.46 d		158.76 d
7	148.81		5	153.61 d		153.89 d
4′	147.57		7	153.00 d		153.28 d
2	146.64		4′	148.82		149.10
6	145.88		2	148.28		148.56
3′	145.04		3′	146.22		146.51
3	135.32		3	136.96		137.25
9	128.53		6	132.17		132.47
1′	122.21		1′	124.14		124.43
6′	119.91	7.53 (dd, J = 8.5, 2.2)	6′	121.72	7.64 dd (J = 8.5, 2.2)	122.02	7.65 dd (J = 8.4, 2.2)
5′	115.59	6.88 (d, J = 8.5)	2′	116.22	7.74 d (J = 2.2)	116.52	7.76 (J = 2.2)
2′	115.03	7.66 (d, J = 2.2)	5′	116.02	6.89 d (J = 8.5)	116.31	6.92 d (J = 8.5)
10	103.31		10	104.95		105.25
8	93.22	6.49 (s)	8	94.70	6.50 s	95.00	6.52 s
			OCH3	60.97	3.89 s	61.27	3.92 s
C5-OH		12.25 (s)
C6-OH		10.48 (s)
C3′-OH		9.55 (s)
C4′-OH		9.28 (s)
C3-OH		9.19 (s)
C7-OH		8.65 (s)

^a 700 MHz, DMSO-d₆; ^b 700 MHz, CD₃OD; ^c 400 MHz, CD₃OD; ^d these values may be interchangeable.