Table 1.

¹H (500 MHz, CD₃OD) and ¹³C (125 MHz, CD₃OD) NMR data for 1.

Position	δH (J in Hz) a	δC (Mult.) b	1H–1H COSY	HMBC
2		167.0 (C)
3	4.23, td (3.9, 1.3) c	57.2 (CH) d	H-11	C-2, C-5
5		169.9 (C)
6	2.54, dd (11.3, 1.6)	58.4 (CH)	H-7
7	1.32, m; 2.09, d (11.0)	31.6 (CH2)
8	1.33, m; 1.83, m	24.8 (CH2)	H-7, H-9
9	1.33, m; 1.65, m	25.3 (CH2)	H-7, H-8, H-10
10	2.20, td (12.9, 3.2);	43.3 (CH2)	H-8, H-9
	4.50, dt (13.5, 2.0)
11	3.17, dd (14, 1.8)	40.9 (CH2)	H-3	C-2, C-3, C-12, C-13
	4.50, dt (13.5, 2.0)
12		126.5 (C)
13, 13‘	6.91, d (8.5)u	132.5 (CH)	H-14	C-11, C-15
14, 14‘	6.70, d (8.5)	116.2 (CH)	H-13	C-12, C-15
15		158.2 (C)

^a 500 MHz in CDCl₃; ^b 125 MHz in CDCl₃; ^c J values (Hz) are given in parentheses; ^d Numbers of the attached protons were deduced by DEPT experiments.