Table 1.

NMR Spectroscopic Data for Napyradiomycin CNQ525.510B (1)^a,^b

Carbon #	δC, type	δH, mult (J in Hz)	COSY	HMBCc
1	90.6, C
2	30.0, CH2	1.59, m	H-3a, H-3b	1, 3, 6
		1.23, m	H-3a, H-3b	1, 3, 6
3	26.9, CH2	1.59, m		1, 2, 4, 5
		1.67, m		1, 2, 4, 5
4	87.2, CH	3.82, d (4.6)	H-3a, H-3b	1, 2, 3, 5, 6
5	41.3, C
6	49.0, CH	1.81, bs		1, 2, 5, 7, 21, 22, 23
7	37.0, CH2	1.47, d (15.4)	H6	1, 5, 6, 8, 12, 20
		2.07, dd (3.4, 15.4)	H6	1, 5, 6, 8, 12, 20
8	83.9, C
9	79.3, C
10	59.0, CH	4.50, dd (3.8, 12.0)		9, 11, 12, 24, 25
11	42.6, CH2	2.37, m	H10	8, 9, 10, 12, 13,
		2.54, dd (3.8, 14.0)	H10	8, 9, 10, 12, 13,
12	81.7, C
13	194.1, C
14	107.7, C
15	163.6, C
16	120.2, C
17	163.4, C
18	107.7, CH	7.26, s		14, 15, 16, 17, 18, 19, 20, 26
19	131.8, C
20	192.9, C
21	21.1, CH3	1.48, s		1, 2, 6
22	21.4, CH3	0.29, s		4, 5, 22
23	31.7, CH3	0.89, s		4, 5, 23
24	22.8, CH3	1.31, s		9, 10, 24
25	29.5, CH3	1.49, s		9, 10, 25
26	8.6, CH3	2.21, s		14, 15, 16, 17, 18, 19
OH (15)		12.39, s		14, 15, 16

^a1H spectra were recorded in CDCl₃ at 500 MHz,

^bAssignments were made based on interpretation of COSY, HMBC and HSQC experiments.

^cHMBC correlations are from the proton(s) stated to the indicated carbons.