Table 4.

¹H and ¹³C NMR (DMSO-d₆) data for goondapyrones I–J (9–10).

Position	(9) δC, Type A	δH, Mult (J in Hz)	(10) δC, Type A	δH, Mult (J in Hz)
1	164.4, C	-	164.0, C	-
2	97.3, C	-	103.5, C	-
3	164.7, C	-	164.2, C	-
4	106.4, C	-	106.4, C	-
5	156.6, C	-	156.9, C	-
6	29.6, CH2	3.21, d (7.0)	29.7, CH2	3.21, d (7.0)
7	118.6, CH	5.19, t (7.0)	118.6, CH	5.19, t (7.0)
8	136.9, C	-	136.9, C	-
9	42.2, CH2	2.75, d (6.9)	42.2, CH2	2.75, d (6.9)
10	124.0, CH	5.45, dt (15.6, 6.9)	124.0, CH	5.45, dt (15.6, 6.9)
11	136.6, CH	6.02, d (15.6)	136.6, CH	6.02, d (15.6)
12	132.1, C	-	132.1, C	-
13	135.4, CH	5.29, d (9.3)	135.4, CH	5.29, d (9.3)
14	36.1, CH	2.53, m	36.1, CH	2.54, m
15	80.5, CH	3.59, br d (6.6)	80.5, CH	3.59, br s
16	119.4, CH	5.33, q (6.6)	119.4, CH	5.32, q (6.6)
17	137.7, C	-	137.8, C	-
18	11.3, CH3	1.50, s	11.3, CH3	1.50, s
2-CH3	9.2, CH3	1.82, s	-	-
2-CH2CH3	-	-	16.5, CH2	-
2-CH2CH3	-	-	12.8, CH3	-
4-CH3	9.8, CH3	1.88, s	9.8, CH3	1.88, s
8-CH3	16.3, CH3	1.66, s	16.3, CH3	1.66, s
12-CH3	12.7, CH3	1.65, s	12.7, CH3	1.65, s
14-CH3	17.9, CH3	0.76, d (6.8)	17.9, CH3	0.75, d (6.7)
17-CH3	12.8, CH3	1.54, d (6.7)	12.8, CH3	1.54, d (6.6)
3-OH	-	10.46, s	-	10.44, br s
15-OH	-	4.46, d (3.6)	-	4.47, d (3.9)

^A—Resonance type assigned on the basis of 1D and 2D NMR analysis.