Table 1.

¹H and ¹³C NMR (400/100 MHz, resp.) data of 1, 3, and 9 in CD₃OD.

Unit	Ring	No	1a		3b		9b
			1H (mult., J in Hz)	13C	1H (mult., J in Hz)	13C	1H (mult., J in Hz)	13C
I	C	2	5.03, brs	77.1		100.1		100.3
		3	3.89, dd (2.0, 1.0)	73.2	4.05, d, (3.4)	68.3	4.13, d, (3.5)	67.8
		4	4.49, dd (2.0, 0.9)	37.0	4.45, d, (3.4)	29.5	4.20, d, (3.5)	29.5
	A	5		157.6*		157.1		156.8
		6	AB	AB	6.03, d (2.4)	98.3	5.89, d (2.4)	98.0
		7		157.8*		158.1		158.2
		8	AB	AB	6.08, d (2.4)	96.7	6.04, d (2.4)	96.5
		9		158.1*		154.2		154.0
		10		101.7		104.4		103.9
	B	1′		132.7		132.6		132.4
		2′	6.87, d (1.9)	115.0	7.16, d (2.1)	115.7	7.13, d (2.2)	115.7
		3′		145.8		145.6		145.6
		4′		145.5		146.7		146.8
		5′	6.71, d (8.2)	115.7	6.82, d (8.4)	115.6	6.80, d (8.4)	115.6
		6′	6.71, dd (8.2, 1.9)	119.1	7.03, dd (8.4, 2.1)	119.8	7.01, dd (8.4, 2.2)	119.9
II	F	2			5.31, brs	79.1	4.54, d (9.8)	84.5
		3			3.98, brd (1.9)	72.9	4.57, dd (9.8, 8.4)	73.0
		4			4.56, brs	37.9	4.48, brd (8.4)	38.6
	D	5				157.0		156.1
		6			6.06, s	96.3	5.97, s	97.6
		7				152.4		151.9
		8				106.8		107.0
		9				152.4		152.2
		10				105.6		108.8
	E	1′				131.8		131.3
		2′			7.13, d (2.1)	116.2	7.07, d (2.1)	116.3
		3′				145.9		146.2
		4′				146.2		146.8
		5′			6.80, d (8.3)	116.1	6.84, d (8.2)	116.2
		6′			6.96, dd (8.3, 2.1)	120.6	6.95, dd (8.2, 2.1)	121.1
phloroglucinol		1″		107.4		AB		107.5
		2″&6″		158.7		AB		159.7
		3″&5″	5.75, s	95.1	AB	AB	5.79, s	95.5
		4″		160.0		AB		160.1

^a,bNMR data were acquired at ^a255 K, and ^b298 K

^*interchangeable assignment; AB: absence of signals.