-
2
-
-
0031929489
-
-
Schmidt T.J., Schmidt H.M., Müller E., Peters W., Fronczek F.R., Truesdale A., Fischer N.H. J. Nat. Prod. 61:1998;230.
-
(1998)
J. Nat. Prod.
, vol.61
, pp. 230
-
-
Schmidt, T.J.1
Schmidt, H.M.2
Müller, E.3
Peters, W.4
Fronczek, F.R.5
Truesdale, A.6
Fischer, N.H.7
-
16
-
-
84970544766
-
-
Wong M.R., Gulbis J.M., Mackay M.F., Craik D.J., Andrews P.R. Aust. J. Chem. 41:1988;1071.
-
(1988)
Aust. J. Chem.
, vol.41
, pp. 1071
-
-
Wong, M.R.1
Gulbis, J.M.2
Mackay, M.F.3
Craik, D.J.4
Andrews, P.R.5
-
17
-
-
0025689296
-
-
Niwa H., Nisiwaki M., Tsukada I., Ishigaki T., Ito S., Wakamatsu K., Mori T., Ikagawa M., Yamada K.J. Am. Chem. Soc. 112:1990;9001.
-
(1990)
Am. Chem. Soc.
, vol.112
, pp. 9001
-
-
Niwa, H.1
Nisiwaki, M.2
Tsukada, I.3
Ishigaki, T.4
Ito, S.5
Wakamatsu, K.6
Mori, T.7
Ikagawa, M.8
Yamada, K.J.9
-
18
-
-
84952253409
-
-
50 at 12 mg/kg, mouse i.p.) which, however, is much weaker than that of the β-lactones. Neomajucin appears to represent an abnormality, since other majucin derivatives are inactive. See
-
50 at 12 mg/kg, mouse i.p.) which, however, is much weaker than that of the β-lactones. Neomajucin appears to represent an abnormality, since other majucin derivatives are inactive. See Kouno, I.; Baba, N.; Hashimoto, M.; Kawano, N.; Takahashi, M.; Kaneto, H.; Yang, C.-S.; Sato, S. Chem. Pharm. Bull. 1989, 37, 2448 and Kouno, I.; Baba, N.; Hashimoto, M.; Kawano, N.; Takahashi, M.; Kaneto, H.; Yang, C.-S. Chem. Pharm. Bull. 1990, 38, 422.
-
(1989)
Chem. Pharm. Bull.
, vol.37
, pp. 2448
-
-
Kouno, I.1
Baba, N.2
Hashimoto, M.3
Kawano, N.4
Takahashi, M.5
Kaneto, H.6
Yang, C.-S.7
Sato, S.8
-
19
-
-
0025266075
-
-
and
-
50 at 12 mg/kg, mouse i.p.) which, however, is much weaker than that of the β-lactones. Neomajucin appears to represent an abnormality, since other majucin derivatives are inactive. See Kouno, I.; Baba, N.; Hashimoto, M.; Kawano, N.; Takahashi, M.; Kaneto, H.; Yang, C.-S.; Sato, S. Chem. Pharm. Bull. 1989, 37, 2448 and Kouno, I.; Baba, N.; Hashimoto, M.; Kawano, N.; Takahashi, M.; Kaneto, H.; Yang, C.-S. Chem. Pharm. Bull. 1990, 38, 422.
-
(1990)
Chem. Pharm. Bull.
, vol.38
, pp. 422
-
-
Kouno, I.1
Baba, N.2
Hashimoto, M.3
Kawano, N.4
Takahashi, M.5
Kaneto, H.6
Yang, C.-S.7
-
22
-
-
0023134146
-
-
Okuda T., Yoshida T., Chen X.-M., Xie J.-X., Fukushima M. Chem. Pharm. Bull. 35:1987;182.
-
(1987)
Chem. Pharm. Bull.
, vol.35
, pp. 182
-
-
Okuda, T.1
Yoshida, T.2
Chen, X.-M.3
Xie, J.-X.4
Fukushima, M.5
-
23
-
-
0015218501
-
-
A number of nitrogen containing picrotoxane derivatives isolated from Dendrobium species, e.g. dendrobine, are also convulsants which, however, apparently possess a somewhat different mode of action since dendrobine has been shown to influence glycine- rather than GABA receptors (
-
A number of nitrogen containing picrotoxane derivatives isolated from Dendrobium species, e.g. dendrobine, are also convulsants which, however, apparently possess a somewhat different mode of action since dendrobine has been shown to influence glycine- rather than GABA receptors (Curtis, D.R.; Duggan, A.W.; Felix, D.; Johnston, G.A.R. Brain Res. 1971, 32, 69 and Kudo, Y.; Tanaka, A.; Yamada, K. Br. J. Pharmac. 1983, 78, 709); These derivatives were, therefore, not taken into account in the present study. A recent QSAR study on picrodendrins, a group of GABA antagonistic norditerpenes isolated from the Euphorbiacea Picrodendron baccatum, whose carbon skeleton is for the major part identical with that of the picrotoxanes, has shown the importance of basically the same structural features with respect to those molecule parts which these compounds share with the picrotoxanes (Ozoe, Y.; Akamatsu, M.; Higata, T.; Ikeda, I.; Mochida, K.; Koike, K.; Ohmoto, T.; Nikaido, T. Bioorg. Med. Chem. 1998, 6, 481). The most active representative of this series, picrodendrin Q, possesses an isopropyl group at C-4 in trans orientation to the 3,5-lactone ring (analogous to α-dihydropicrotoxinin) and, moreover, shares with the active picrotoxanes the C-6-OH group and an α-oriented oxygen function at C-13 (equivalent to C-9 in the picrotoxanes). Apart from the influence of the additional carbon and oxygen atoms which apparently lead to a somewhat altered mode of binding of the picrodendrins (picrodendrin Q is more active than picrotoxinin in spite of possessing an isopropyl instead of an isopropenyl group), introduction of OH groups at C-4 or C-8 (equivalent to C-4 and C-12 of the picrotoxanes, respectively) leads to a decrease in activity.
-
(1971)
Brain Res.
, vol.32
, pp. 69
-
-
Curtis, D.R.1
Duggan, A.W.2
Felix, D.3
Johnston, G.A.R.4
-
24
-
-
0020580763
-
-
and These derivatives were, therefore, not taken into account in the present study. A recent QSAR study on picrodendrins, a group of GABA antagonistic norditerpenes isolated from the Euphorbiacea Picrodendron baccatum, whose carbon skeleton is for the major part identical with that of the picrotoxanes, has shown the importance of basically the same structural features with respect to those molecule parts which these compounds share with the picrotoxanes (
-
A number of nitrogen containing picrotoxane derivatives isolated from Dendrobium species, e.g. dendrobine, are also convulsants which, however, apparently possess a somewhat different mode of action since dendrobine has been shown to influence glycine- rather than GABA receptors (Curtis, D.R.; Duggan, A.W.; Felix, D.; Johnston, G.A.R. Brain Res. 1971, 32, 69 and Kudo, Y.; Tanaka, A.; Yamada, K. Br. J. Pharmac. 1983, 78, 709); These derivatives were, therefore, not taken into account in the present study. A recent QSAR study on picrodendrins, a group of GABA antagonistic norditerpenes isolated from the Euphorbiacea Picrodendron baccatum, whose carbon skeleton is for the major part identical with that of the picrotoxanes, has shown the importance of basically the same structural features with respect to those molecule parts which these compounds share with the picrotoxanes (Ozoe, Y.; Akamatsu, M.; Higata, T.; Ikeda, I.; Mochida, K.; Koike, K.; Ohmoto, T.; Nikaido, T. Bioorg. Med. Chem. 1998, 6, 481). The most active representative of this series, picrodendrin Q, possesses an isopropyl group at C-4 in trans orientation to the 3,5-lactone ring (analogous to α-dihydropicrotoxinin) and, moreover, shares with the active picrotoxanes the C-6-OH group and an α-oriented oxygen function at C-13 (equivalent to C-9 in the picrotoxanes). Apart from the influence of the additional carbon and oxygen atoms which apparently lead to a somewhat altered mode of binding of the picrodendrins (picrodendrin Q is more active than picrotoxinin in spite of possessing an isopropyl instead of an isopropenyl group), introduction of OH groups at C-4 or C-8 (equivalent to C-4 and C-12 of the picrotoxanes, respectively) leads to a decrease in activity.
-
(1983)
J. Pharmac.
, vol.78
, pp. 709
-
-
Kudo, Y.1
Tanaka, A.2
Yamada K., Br.3
-
25
-
-
0032053482
-
-
The most active representative of this series, picrodendrin Q, possesses an isopropyl group at C-4 in trans orientation to the 3,5-lactone ring (analogous to α-dihydropicrotoxinin) and, moreover, shares with the active picrotoxanes the C-6-OH group and an α-oriented oxygen function at C-13 (equivalent to C-9 in the picrotoxanes). Apart from the influence of the additional carbon and oxygen atoms which apparently lead to a somewhat altered mode of binding of the picrodendrins (picrodendrin Q is more active than picrotoxinin in spite of possessing an isopropyl instead of an isopropenyl group), introduction of OH groups at C-4 or C-8 (equivalent to C-4 and C-12 of the picrotoxanes, respectively) leads to a decrease in activity.
-
A number of nitrogen containing picrotoxane derivatives isolated from Dendrobium species, e.g. dendrobine, are also convulsants which, however, apparently possess a somewhat different mode of action since dendrobine has been shown to influence glycine- rather than GABA receptors (Curtis, D.R.; Duggan, A.W.; Felix, D.; Johnston, G.A.R. Brain Res. 1971, 32, 69 and Kudo, Y.; Tanaka, A.; Yamada, K. Br. J. Pharmac. 1983, 78, 709); These derivatives were, therefore, not taken into account in the present study. A recent QSAR study on picrodendrins, a group of GABA antagonistic norditerpenes isolated from the Euphorbiacea Picrodendron baccatum, whose carbon skeleton is for the major part identical with that of the picrotoxanes, has shown the importance of basically the same structural features with respect to those molecule parts which these compounds share with the picrotoxanes (Ozoe, Y.; Akamatsu, M.; Higata, T.; Ikeda, I.; Mochida, K.; Koike, K.; Ohmoto, T.; Nikaido, T. Bioorg. Med. Chem. 1998, 6, 481). The most active representative of this series, picrodendrin Q, possesses an isopropyl group at C-4 in trans orientation to the 3,5-lactone ring (analogous to α-dihydropicrotoxinin) and, moreover, shares with the active picrotoxanes the C-6-OH group and an α-oriented oxygen function at C-13 (equivalent to C-9 in the picrotoxanes). Apart from the influence of the additional carbon and oxygen atoms which apparently lead to a somewhat altered mode of binding of the picrodendrins (picrodendrin Q is more active than picrotoxinin in spite of possessing an isopropyl instead of an isopropenyl group), introduction of OH groups at C-4 or C-8 (equivalent to C-4 and C-12 of the picrotoxanes, respectively) leads to a decrease in activity.
-
(1998)
Bioorg. Med. Chem.
, vol.6
, pp. 481
-
-
Ozoe, Y.1
Akamatsu, M.2
Higata, T.3
Ikeda, I.4
Mochida, K.5
Koike, K.6
Ohmoto, T.7
Nikaido, T.8
-
26
-
-
0343724466
-
-
A full list of crystallographic data and parameters is deposited at the Cambridge Crystallographic Data Centre
-
A full list of crystallographic data and parameters is deposited at the Cambridge Crystallographic Data Centre.
-
-
-
|