Table 2.

NMR data for compound 2 in DMSO-d₆.

4,8,10,14-tetramethyl-6-acetoxy-14-[16-acetoxy-19-(20,21-dimethyl)-18-ene]-phenanthrene-1-ene-3,7-dione (2)
Position	δC, type	δH ( J in Hz)	HMBC	COSY	NOESY
1	158.4, CH	7.42, d (10.0)	3, 5, 10
2	126.8, CH	5.76, d (10.0)	10	H-1
3	200.8, C
4	39.5, CH	2.74, m	4-CH3
4-CH3	12.3, CH3	1.12, d (7.2)	3, 4, 5	H-4	H-6
5	45.6, CH	2.41, m	4	H-4	H-6, H-8-CH3
6	73.0, CH	5.04, s	7, 8, 10, 6-OAc		H-5, H-4-CH3
6-OAc	169.0, C
CH3	20.4, CH3	2.09, s	6-OAc
7	209.3, C
8	52.3, CH
8-CH3	17.5, CH3	1.10, s	7, 8, 9, 14		H-5, H-15
9	41.2, CH	2.54, m
10	37.7, C
10-CH3	27.1, CH3	1.39, s	1, 5, 9, 10		H-4
11	23.3, CH2	1.57, 1.87, m	12
12	25.5, CH2	1.70, 2.29, m		H-13
13	29.0, CH2	2.31, 1.22, m		H-12
14	46.1, C
14-CH3	17.5, CH3	0.81, s	8, 14, 15
15	40.5, CH2	1.64, 2.05, d (8.4)	13, 16, 14-CH3
16	73.3, CH	5.70, br	14	H-17
16-OAc	169.9, C
CH3	20.5, CH3	1.87, s	16-OAc
17	28.1, CH2	1.99; 2.09, m		H-16
18	124.1, CH	5.11, t (8.0)		H-17
19	130.8, C
20	17.5, CH3	1.58, s	21, 22, 24
21	20.5, CH3	1.65, s	21, 22, 23