Journal of Asian Natural Products Research
857
918, 877, 813, 779, 752, 715, 669, 634,
596; 1H NMR (d, ppm): 7.37 (m, 1H), 7.15
(m, 1H), 6.90 (d, 1H, J ¼ 9.7 Hz), 6.44 (bs,
D2O exchangeable), 6.18 (m, 1H), 5.89 (d,
1H, J ¼ 9.7 Hz), 3.80 (s, 1H), 2.30 (m,
1H), 2.75 (m, 1H), 2.67 (m, 1H), 2.07 (m,
1H), 1.94 (m, 1H), 1.85 (m, 1H), 1.69 (m,
1H), 0.75–1.57 (br s, £ CH3); 13C NMR
(d, ppm): 203.7, 197.9, 152.4, 143.0,
141.1, 139.3, 134.8, 127.2, 123.1, 110.6,
69.8, 55.0, 46.8, 48.5, 43.1, 42.1, 42.0,
41.7, 40.2, 35.1, 26.7, 23.9, 23.0, 21.1,
20.2, 19.4. MS m/z: 422 [M]þ.
38.8, 36.4, 36.5, 31.8, 31.7, 31.6, 31.5, 24.5,
22.8, 21.1, 19.4, 13.2. MS m/z: 316 [M]þ.
3.2.8 b-Amyrin
C30H50O; mp 196–1988C; UV lmax
(MeOH): 206 nm; IR (KBr) cm21: 3316,
2854, 1643, 1456, 1360, 1195, 1036, 988,
881, 824, 660; 1H NMR (d, ppm): 4.62 (m,
1H), 3.21 (m, 1H), 1.92–2.10 (m, 2H),
1.65–1.85 (4H, m), 1.40–1.55 (m, 12H),
0.90–1.10 (m, 4H), 1.03 (s, 3H), 0.99 (s,
3H), 0.96 (s, 2H), 0.94 (s, 3H), 0.91 (s, 3H),
0.82 (s, 3H), 0.79 (s, 3H), 0.76 (s, 3H); 13
C
NMR (d, ppm): 150.1, 124.4, 79.0, 55.2,
48.0, 48.0, 46.9, 41.5, 40.0, 38.7, 38.7,
37.1, 34.2, 33.3, 32.9, 32.6, 31.3, 28.1,
28.4, 28.0, 27.4, 26.1, 25.1, 23.5, 23.5,
18.9, 16.1, 15.7, 15.4. MS m/z: 426 [M]þ.
3.2.6 Deacetyl forskolin
C20H32O6; mp: 163–1668C; UV lmax
(MeOH): 210 nm; IR (KBr) cm21: 3419,
2939, 1716, 1562, 1402, 1247, 1103, 1060;
1H NMR (d, ppm): 6.12 (dd, 1H, J ¼ 17.4,
10.7 Hz), 5.19 (d, 1H, J ¼ 17.3 Hz), 4.98
(d, 1H, J ¼ 10.8 Hz), 4.63 (m, 1H), 4.48
(m, 1H), 4.13 (m, 1H), 3.18 (d, 1H,
J ¼ 17.2 Hz), 2.50 (d, 1H, J ¼ 17.2 Hz),
2.35 (m, 1H), 2.20 (m, 1H), 2.09 (m, 1H),
1.75 (m, 1H), 1.65 (s, 3H), 1.43 (s, 3H),
Acknowledgements
R.M.K. thanks DBT, V.P.S. and V.R.K. thank
CSIR for the financial support and Spic Science
Foundation for the Analytical Center Facility.
Supporting Information
1.41 (s, 3H), 1.27 (s, 3H), 1.06 (s, 3H); 13
C
Supporting information is available online.
NMR (d, ppm): 205.8, 146.5, 110.5, 82.3,
82.2, 75.2, 74.8, 74.7, 70.5, 48.8, 48.8,
43.0, 42.8, 36.1, 34.3, 33.0, 30.8, 24.2,
23.4, 20.0. MS m/z: 368 [M]þ.
References
[1] S.V. Bhat, B.S. Bajqwa, H. Dornauer, and
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(1977).
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[3] A.R. Jorge, J.L. Salvador, A. Leitao,
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[4] T. Nelson and E.S. Werstiuk, Can.
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[9] A. Chatterjee and P.S. Chandra, Treatise
on Indian Medicinal Plants, 3rd ed.
3.2.7 Pregnenolone
C21H32O2; mp 171–1738C; UV lmax
(MeOH): 206 nm; IR (KBr) cm21: 3506,
3352, 3028, 2933, 2835, 1683, 1461, 1433,
1357, 1292, 1224, 1191, 1168, 1134, 1097,
1053, 985, 950, 914, 840, 800, 596, 468;
1H NMR (d, ppm): 5.36 (m, 1H), 3.53 (m,
1H), 2.54 (t, 1H, J ¼ 9.0 Hz), 2.20–2.35
(m, 2H), 2.20–2.35 (m, 2H), 2.13 (s, 3H),
2.06 (m, 1H), 2.04 (m, 2H), 1.40–1.75 (m,
2H), 1.40–1.75 (m, 2H), 1.40–1.75 (m,
1H), 1.40–1.75 (m, 1H), 1.40–1.75 (m,
2H), 1.40–1.75 (m, 1H), 1.00–1.30 (m,
2H), 1.0–1.30 (m, 2H), 1.01 (s, 3H), 0.63
(s, 3H); 13C NMR (d, ppm): 209.6, 140.8,
121.3, 71.6, 63.7, 56.9, 50.0, 44.0, 42.2,