Table 2. NMR spectroscopic data for compounds 12 and 13 (pyridine-d₅).

Position	12		13
	δC	δH (J in Hz)	δC	δH (J in Hz)
1	75.9	4.31, brs	76.2	4.19, brs
2	38.9	2.61, m	36.6	2.62, m
		2.12, t (11.1)		2.23, m
3	63.7	5.13, m	69.2	4.85, m
4	44.0	2.61, m	75.9	4.34, d (9.1)
		2.26, m
5	77.4		80.7
6	36.7	1.98, m	69.5	4.94, s
		1.58, d (13.2)
7	29.2	1.49, m	35.4	2.07, m
		1.07, m		1.55, m
8	35.4	1.66, m	30.7	2.38, d (8.4)
9	45.8	1.45, m	45.9	1.50, m
10	43.3		44.9
11	21.7	1.38, m	21.4	1.50, m
				1.40, m
12	40.3	1.66, m	40.1	1.66, m
		0.99, m		1.00, m
13	41.1		41.1
14	56.6	0.97, m	56.3	1.02, m
15	32.5	2.05, dd (12.1, 5.5)	32.5	2.07, m
		1.46, m		1.43, m
16	81.8	4.65, dd (14.6, 7.7)	81.8	4.62, dd (14.5, 7.6)
17	63.4	1.85, m	63.4	1.85, m
18	16.9	0.87, s	16.9	0.87, s
19	13.7	1.50, s	16.9	1.86, s
20	42.3	1.98, m	42.2	1.96, m
21	15.4	1.12, d (7.0)	15.4	1.10, d (7.0)
22	109.8		109.8
23	33.6	1.80, m	33.6	1.77, m
24	29.3	2.73, td (13.2, 5.8)	29.3	2.69, td (13.6, 5.5)
		2.26, m		2.23, m
25	144.8		144.8
26	65.4	4.51, d (12.0)	65.4	4.47, d (12.1)
		4.06, d (12.0)		4.03, d (11.9)
27	109.1	4.83, s	109.1	4.81, s
		4.80, s		4.78, s