Table 2.

NMR spectroscopic data for compounds 1–3 in D₆-acetone (¹H NMR at 700 MHz; ¹³C at 500 MHz).

	1			2			3
No.	13C	DEPT	1H/HSQC	13C	1H/HSQC		DEPT
1	202.6	C		202.6		83.9	C
2	120.2	C		119.0		194.1	C
3	187.9	C		191.2		120.3	C
4	38.9	CH2	2.61 (s),3.29 (s)	43.8	2.41 (s)2.88 (s)	170.1	C
5	86.3	C		84.4		58.3	CH	3.46 (s)
6	15.5	CH2	2.11 (q), J= 7.53 Hz	15.2	2.11 (q), J= 7.53 Hz	16.7	CH2	2.16 (q), J=7.53 Hz
7	12.7	CH3	0.93 (t), 7.53 Hz	12.8	0.93 (t), 7.53 Hz	13.2	CH3	0.78 (t), J=7.53 Hz
8	210.7	C		210.1		57.4	CH3	3.84 (s)
9	40.1	CH2	2.61 (m), 2.74(m)	38.9	2.53 (dt), J=7.10, 17.96 Hz2.68 (m), J=7.10, 17.96 Hz
10	17.8	CH2	1.55 (m)	17.6	1.55 (m)
11	14.0	CH3	0.88 (t), 7.42 Hz	13.9	0.86 (t), 7.31 Hz
12	58.3	CH3	4.05 (s)