Table 1.

¹H-NMR and ¹³C-NMR data of 1 (600/150 MHz, Methanol-d₄).

Position	δC	δH (J in Hz)	HMBC
1	130.3
2	112.5	7.56, d, 2.0	C-1, C-3, C-4, C-6, C=O
3	149.0		C-1, C-2, C-4, C-5
4	153.3
5	115.7	6.80, d, 8.5	C-1, C-3, C-4, C-6
6	125.2	7.62, dd, 8.5, 2.0	C-1, C-2, C-4, C-5
C=O	199.6
α	65.5	4.26, dd, 11.0, 8.5, 3.71, dd, 11.0, 5.5	C-1, C-1′, C=O, C-β
β	56.3	4.76, dd, 8.5, 5.0	C-1′,C-2′, C-6′, C=O, C-α
1′	129.9		C-α, C-β, C-2′, C-3′, C-5′, C-6′
2′	112.7	6.89, d, 2.0	C-β, C-1′,C-3′, C-4′, C-6′
3′	149.3
4′	147.0
5′	116.6	6.73, d, 8.5	C-1′, C-3′, C-4′, C-6′
6′	122.2	6.76, dd, 8.5, 2.0	C-β, C-1′,C-2′, C-4′, C-5′
3-OCH3	56.3	3.86, s	C-3
4′-OCH3	56.4	3.82, s	C-4′