Table 1.

¹H and ¹³C NMR Data for Compounds 1 and 2^a

no	1			2
	1Hb	1Hc	13Cb	1Hb	1Hc	13Cb
1			149.1			162.5
2			103.0	6.03 s	6.51 s	97.9
3			149.1			158.6
4			144.6			99.7
4a			148.1			150.4
5	7.35 br s	7.33 d (9.0)	115.1	6.59 s	7.22 s	99.9
6	7.35 br s	7.51 d (9.0)	123.4			155.3
7			151.5			142.0
8			128.3			126.0
8a			117.8			108.6
9			183.2			181.3
9a			103.3			102.9
10a			150.4			152.7
1′	6.64 d (10.1)	7.07 d (10.1)	116.1	6.74 d (9.8)	6.77 d (12.0)	114.7
2′	5.76 d (10.1)	5.63 d (10.1)	127.0	5.67 d (9.8)	5.52 d (12.0)	127.2
3′			77.8			77.9
4′	1.45 s	1.39	27.7	1.41 s	1.44 s	27.8
5′	1.45 s	1.39	27.7	1.41 s	1.44 s	27.8
1″	4.03 d (6.4)	4.68 d (7.1)	25.6	3.93 d (6.1)	4.77 d (6.9)	25.4
2″	5.18 br t (6.4)	5.83 br t	124.7	5.25 br t (6.1)	5.92 br t (6.9)	123.8
		(7.1)
3″			130.3			130.0
4″	1.78 s	2.04	18.0	1.75 s	2.08 s	18.1
5″	1.61 s	1.75	25.1	1.60 s	1.76 s	25.7
1-OH	13.12 s	13.83 s		14.55 s

^aδ (ppm), 500 MHz for ¹H NMR and 125 MHz for ¹³C NMR; multiplicities; J values (Hz).

^bDMSO-d₆

^cpyridine-d₅