Table 1.

¹H and ¹³C NMR spectroscopic data (700 MHz and 175 MHz in CDCl₃) for mycousfurans (1–2).

Position	1		HMBC	2
	δC, Type	δH, mult. (J in Hz)		δC, Type	δH, mult. (J in Hz)
1	200.5, C			201.0, C
2	100.6, CH	5.55, s		100.2, CH	5.55, s
3	175.4, C			175.9, C
4α 4β	34.3, CH2	3.15, d (17.5), 2.96, d (17.5)	2, 4a 2, 4a	34.2, CH2	3.20, d (17.5) 2.94, d (17.5)
4a	111.6, C			110.6, C
5a	157.1, C			160.7, C
6	102.0, C			100.4, C
7	163.3, C			165.5, C
8	107.5, C			107.1, C
9	159.6, C			156.4, C
9a	106.5, C			106.1, C
9b	57.9, C			58.9, C
10	16.6, CH3	1.62, s	1, 4a, 9a, 9b	16.2, CH3	1.66, s
11	7.4, CH3	2.04, s	8	7.5, CH3	2.02, s
12	201.2, C			203.8, C
13	31.3, CH3	2.61, s	6, 12	32.9, CH3	2.73, s
14	50.9, CH3	3.49, s	4a	50.3, CH3	3.47, s
15	56.9, CH3	3.81, s	2, 3	56.8, CH3	3.84, s
7-OH		13.34, s	6, 7, 8		14.32, s
9-OH		9.34, s	8, 9a		9.61, s