TABLE 2

¹H NMR data of metabolites M-6 to M-10

δ in ppm, J in Hz.

No.	M-6^{^a}	M-7^{^b}	M-8^{^b}	M-9^{^b}	M-10^{^c}
1	2.85 (br.d, 6.4)	3.21(br.s)	3.22 (br.s)	3.09 (m)	3.01 (br.d, 6.5)
2	2.28 (dd, 18.3, 6.8, α) 2.57 (br.d, 18.3, β)	2.43 (br.s) 2.42 (br.s)	2.44 (d, 1.0) 2.43 (d, 2.1)	2.23 (dd,19.2,1.7, β) 2.35 (dd,19.2,6.4,α)	2.32 (m, β) 2.45 (dd, 6.5,19.5, α)
6	2.36 (dd, 13.0, 12.2, α) 3.02 (dd, 13.0, 5.1, β)	2.13 (dd, 12.0, 11.7, β) 2.92 (dd, 12.0, 3.3, α)	2.32 (dd, 11.9, 12.0, α) 2.87 (dd, 11.9, 3.1, β)	2.17 (dd,12.6,12.6, α) 3.04 (dd,12.6, 5.6, β)	2.80 (dd,4.8,12.0, β) 2.22 (br.d, 12.0, α)
7	2.20 (m)	1.26 (dd, 11.7, 3.2)	1.78 (m)	1.70 (dd, 11.9, 5.6)	2.27 (m)
8
9	2.74 (d, 11.9, β) 3.17 (d, 11.9, α)	1.84 (d, 12.5, β) 2.13 (dd,12.5, 1.5, α)	1.82 (d, 12.4, α) 2.15 (d, 12.4,2.4, β)	2.19 (d, 13.0, β) 2.57 (dd,13.0,0.7, α)	2.38 (d, 13.3, β) 2.49 (d, 13.3, α)
11	2.08 (m)	2.21 (m)	2.45 (m)	1.98 (m)	2.32 (m)
12	1.01 (d, 6.9)	1.08 (d, 6.6)	3.58 (dd, 8.3, 3.2, α) 4.07 (dd, 8.3, 7.9, β)	1.03 (dd, 6.4, 2.6)	4.03 (dd, 4.3, 8.4, β) 3.64 (br.d, 8.4, α)
13	0.99 (d, 6.9)	3.30 (dd, 9.3, 8.1, α) 4.06 (dd, 8.1, 8.1, β)	1.12 (d, 7.3)	3.37 (dd, 10.6, 7.9, α) 3.88 (dd, 7.9, 7.0, β)	1.00 (d, 7.1)
14	3.41 (d,10.9) 3.59 (d,10.9)	3.98 (d, 8.3, α) 4.11 (d, 8.3, β)	4.01 (d, 8.2, α) 4.10 (d, 8.2, β)	3.31 (dd, 8.6, 0.9, β) 3.50 (dd, 8.6, 1.3, α)	3.38 (d, 8.8, β) 3.57 (d, 8.8, α)
15	1.70 (s)	1.67 (d, 2.1)	1.68 (d, 1.9)	1.66 (dd, 1.9, 0.5)	1.70 (d, 1.6)

↵a Recorded at 400 MHz in CDCl₃.
↵b Recorded at 400 MHz in (CD₃)CO.
↵c Recorded at 600 MHz in CDCl₃.