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. 2020 Apr 10;10(2):89–100. doi: 10.1007/s13659-020-00239-z

Table 2.

1H NMR spectroscopic data of compounds 6–11 (600 MHz, δ in ppm)

No 6a 7a 8a 9a 10b 11b
1 2.84, ddd (13.3, 13.3, 10.5) 2.78, ddd (13.3, 13.3, 10.5) 2.76, ddd (13.3, 13.3, 10.5)
3 2.54, m 2.27, m 3.64, br d (12.9)
4

1.98, br dd (13.5, 6.3)

1.83, ddd (13.5, 13.5, 10.6)

2.08, m

1.71, ddd (13.5, 13.5, 10.6)

2.00, ddd (14.2, 5.0, 2.8)

1.84, ddd (14.2, 12.9, 2.0)

2.53, ddd (17.2, 8.1, 2.5)

2.20, ddd (17.2, 10.6, 2.6)

2.52, br d (17.0)

2.32, br dd (17.0, 2.6)

2.51, ddd (17.0, 4.0, 4.0)

2.33, ddd (17.0, 12.0, 4.0)
5 3.75, dd (10.6, 5.0) 3.74, dd (10.6, 5.0) 3.97, ddd (5.0, 5.0, 2.0)

1.88, ddd (14.0, 8.1, 2.6)

1.69, ddd (14.0, 10.6, 2.5)

1.75, m

1.68, m

1.74, m

1.68, m
6 1.93, m 1.93, m 1.87, m 2.15, overlapped 2.16, overlapped
7 3.38, m 3.37, m 3.45, m 2.25, ddd (10.5, 10.5, 8.6) 2.13, overlapped 2.13, overlapped
8

1.47, dd (12.3, 1.6)

1.44, d (12.3)

1.47, dd (12.3, 1.6)

1.44, d (12.3)

1.52, dd (13.6, 12.1)

1.48, d (13.6)

1.73, dd (13.0, 8.6)

1.58, dd (13.0, 10.5)

1.56, overlapped

1.45, dd (13.0, 7.5)

1.55, dd (12.7, 12.7)

1.39, dd (12.7, 7.1)
9
10

2.04, overlapped

1.92, overlapped

2.05, overlapped

1.89, overlapped

 1.93, br s

1.82, dd (12.2, 7.6)

1.50, dd (12.2,12.2)

1.97, dd (12.7, 7.7)

1.33, dd (12.2, 12.2)

2.02, dd (12.2, 7.6)

1.27, dd (12.2, 12.2)
11

4.39, ddd (13.0, 5.0, 2.5)

4.18, ddd (13.0, 3.6, 2.2)

4.32, ddd (13.0, 3.5, 2.0)

4.20, ddd (13.0, 4.5, 2.5)

4.80, br d (13.5)

4.72, br d (13.5)

4.77, d (18.0)

4.70, d (18.0)

4.63, br d (17.0)

4.56, br d (17.0)

4.64, d (16.9)

4.56, d (16.9)
12 5.23, d (5.0) 4.74, d (7.4)
13 0.91, d (7.6) 0.92, d (7.6) 0.88, d (7.0) 1.24, s 0.95, d (7.6) 0.95, d (7.0)
14 1.09, s 1.09, s 0.91, s 1.09, s 1.11, s 1.09, s
15 1.05, s 1.03, s 1.13, s 1.08, s

3.87, d (10.5)

3.81, d (10.5)

3.40, d (10.7)

3.37, d (10.7)
AcO- 2.09, s

aRecorded in CD3OD

bRecorded in CDCl3