Table 3.

NMR Data for compounds 8, (S,S)-9 and (S,R)-9 with the correlations observed in the HSQC and HMBC spectra.

	8			(S,S)-9			(S,R)-9
Pos. a	1H (ppm)	13C/15N (ppm)	Pos. a	1H (ppm)	13C/15N (ppm)	Pos. a	1H (ppm)	13C (ppm)
1	10.18	−236.4	1	10.17	−236.3	1	10.15	–
2	–	152.2	2	–	152.3	2	–	152.2
C2-NH2	6.03	−311.2	C2-NH2	6.01	−311.1	C2-NH2	6.01	–
3	–	−208.0	3	–	−208.0	3	–	–
4	–	151.3p	4	–	151.4	4	–	151.3
5	–	98.8	5	–	98.8	5	–	98.7
6	–	159.3	6	–	159.5	6	–	159.3
7	–	117.6	7	–	117.5	7	–	117.7
8	6.31	113.5	8	6.31	113.6	8	6.32	113.4
9	10.61	−241.4	9	10.60	−241.4	9	10.60	–
10	2.86	28.0	10	2.85	28.1	10	2.86	28.0
11	2.96	36.1	11	2.97	36.2	11	2.98	36.1
12	–	146.1	12	–	146.2	12	–	146.1
13	7.29	128.2	13	7.28	128.2	13	7.28	128.1
14	7.80	127.4	14	7.78	127.5	14	7.79	127.5
15	–	131.4	15	–	131.5	15	–	131.5
16	–	166.4	16	–	166.6	16	–	166.4
17	8.57	−265.6	17	8.34	−265.5	17	8.30	–
18	4.35	52.3	18	4.46	52.8	18	4.50 (1H, m)	52.8
19	1.94 + 2.10	26.5	19	1.92 + 2.03	27.1	19	1.94 + 2.01	27.2
20	2.28	31.8	20	2.34	30.5	20	2.32	30.5
21	–	171.8	C21-OH	c	174.3	C21-OH	c	174.1
C22-OH	12.40 b	173.5	22	–	171.7	22	–	171.6
23	8.15	−260.0	23	8.21	−263.2	23	8.20	–
24	4.21	51.2	24	4.22	51.3	24	4.23	51.1
25	1.75 + 1.93	26.4	25	1.81 + 1.99	26.3	25	1.79 + 1.99	26.4
26	2.27	30.1	26	2.30	30.1	26	2.25	29.9
C27-OH	12.40 b	173.8	C27-OH	c	173.9	C27-OH	c	173.7
C28-OH	12.40 b	173.4	C28-OH	c	173.3	C28-OH	c	173.1

^a Positions of atoms are showed on Figure 3; ^b probably one common signal for the exchanging protons of carboxylic groups; ^c signals not observed.