Table 1.

¹H (500 MHz, CDCl₃) and ¹³C (125 MHz, CDCl₃) NMR data, ¹H–¹H COSY and HMBC correlations for eunicellin 1.

Position	δH (J in Hz)	δC, Multiple	1H–1H COSY	HMBC
1	2.25 dd (11.5, 7.0)	46.1, CH	H-10, H-14	C-9, -10, -14, -18
2	3.61 s	93.0, CH	n.o.	C-1, -3, -9, -10, -14, -15
3		85.2, C
4	2.50 m; 1.97 m	29.2, CH2	H2-5	C-2, -3, -6, -15
5	2.08 m; 1.70 m	23.6, CH2	H2-4, H-6	C-3
6	3.69 dd (12.5, 11.0)	76.3, CH	H2-5, OH-6	C-4, -7, -16
7		78.6, C
8	5.40 d (10.0)	79.2, CH	H-9	C-7, -9, -10, -16, acetate carbonyl
9	3.77 dd (10.0, 7.0)	78.8, CH	H-8, H-10	C-2, -7, -8, -11
10	3.41 dd (7.0, 7.0)	52.0, CH	H-1, H-9	C-1, -8, -9, -11, -12, -14, -17
11		147.7, C
12	2.30 br d (12.5); 2.01 m	31.6, CH2	H2-13	n.o.
13	1.78 m; 1.06 m	25.2, CH2	H2-12, H-14	n.o.
14	1.23 m	44.3, CH	H-1, H2-13, H-18	C-18
15	1.42 s	23.3, CH3		C-2, -3, -4
16	1.31 s	19.6, CH3		C-6, -7, -8
17	4.73 s; 4.58 s	110.1, CH2		C-10, -11, -12
18	1.70 m	29.0, CH	H-14, H3-19, H3-20	C-1, -13, -14, -19, -20
19	0.99 d (7.0)	21.9, CH3	H-18	C-14, -18, -20
20	0.79 d (6.5)	15.3, CH3	H-18	C-14, -18, -19
3-OCOCH2CH2CH3
1′		173.1, C
2′	2.67 dt (16.0, 7.5); 2.51 dt (16.0, 7.5)	36.7, CH2	H2-3	C-1′, -3′, -4′
3′	1.68 m	18.5, CH2	H2-2′, H3-4′	C-1′, -2′, -4′
4′	1.01 t (7.5)	13.5, CH3	H2-3′	C-2′, -3′
8-OAc		171.5, C
	2.05 s	21.4, CH3		Acetate carbonyl
6-OH	4.41 br d (11.0)		H-6	n.o.

n.o. = not observed.