Table 1.

NMR spectroscopic data of compound 1.

Position	δC	δH (mult; J in Hz)	HMBC
1	204.1	-
2	127.5	5.89 (1H; dd; 10.2; 2.0)	C-4, C-10
3	148.8	6.58 (1H; dd; 10.2, 1.9)	C-1, C-5
4	67.3	4.89 (1H; m)	C-1, C-2, C-3, C-6
5	81.4	-
6	52.4	3.02 (1H; d; 12.3)	C-4, C-5, C-7, C-10, Cys (35,3)
7	38.7	2.19 (1H; m), 1.55 (1H; m)	C-6, C-8, C-9, C-14
8	36.7	1.67 (1H; m)
9	47.0	1.39 (1H; m)
10	59.3	-
11	28.4	1.81 (1H; m), 1.42 (1H; m)
12	40.5	1.14 (2H; m)
13	44.4	-
14	56.3	1.18 (1H; m)	C-15
15	25.2	1.70 (1H; m), 1.27 (1H; m)	C-14
16	24.3	1.39 (1H; m), 0.90 (1H; m)	C-13
17	53.1	1.23 (1H; m)
18	12.4	0.75 (3H; s)	C-12, C-13, C14, C-17
19	10.5	1.25 (3H; s)	C-1, C-5, C-9, C-10
20	40.3	1.94 (1H; m)
21	13.6	0.99 (3H; d; 6.8)	C-17, C-20, C-22
22	80.1	4.44 (1H; d; 13.4)	C-20, C-24
23	30.8	2.52 (1H; d; 17.3), 2.16 (1H; m)	C-22, C-24, C-25
24	157.8	-
25	126.4	-
26	168.5	-
27	56.5	4.34 (2H; m)	C-24, C-25, C-26
28	20.3	2.09 (3H; s)	C-23, C-24, C-25
L-Cys	35.3	3.13 (1H; dd; 14.3, 4.7), 2.95 (1H; dd; 14.3, 6.6)	C-6, Cys (55,7)
	55.7	3.70 (1H; m)	Cys (35,3), Cys (172,8)