Zobrazeno 1 - 10
of 128
pro vyhledávání: '"P.L. Majumder"'
Publikováno v:
Phytochemistry. 62:591-596
Agrostophyllinol and agrostophyllinone, two new triterpenoids, were isolated from the orchid Agrostophyllum brevipes. Agrostophyllinone was also isolated from another orchid Agrostophyllum callosum. The structures of agrostophyllinol and agrostophyll
Publikováno v:
Phytochemistry. 52:1365-1369
Reinvestigation of the orchid Dendrobium amoenum afforded two new bibenzyl derivatives, amoenylin and isoamoenylin, and their known structural analogues, 3,4′-dihydroxy-5-methoxybibenzyl and 4,4′-dihydroxy-3,3′,5-trimethoxybibenzyl (moscatilin)
Publikováno v:
Tetrahedron. 55:6691-6702
Agrostophyllol and isoagrostophyllol, two novel diastereomeric 9,10-dihydrophenanthropyran derivatives isolated from the orchid Agrostophyllum callosum , were shown to have the structures 2,7-dihydroxy-6-methoxy-9,10-dihydro-5H-phenanthro[4,5-bcd]pyr
Publikováno v:
Phytochemistry. 49:2375-2378
Thunalbene, a new stilbene derivative, was isolated from the orchid Thunia alba which also afforded six known stilbenoids: batatasin-III, lusianthridin, 3,7-dihydroxy-2,4-dimethoxyphenanthrene, 3,7-dihydroxy-2,4,8-trimethoxyphenanthrene, cirrhopetala
Publikováno v:
Phytochemistry. 47:855-860
The structures of agrostonin and agrostonidin, two new dimeric phenanthrene derivatives isolated from the orchids, Agrostrophyllum khasiyanum and A. callosum , were established as 2,2′,7,7′-tetramethoxy-1,1′-biphenanthryl, respectively, from sp
Publikováno v:
Phytochemistry. 44:167-172
Two new bibenzyl derivatives were isolated from the orchid Bulbophyllum protractum and designated bulbophyllin and bulbophyllidin. In addition batatasin-III (3,3′-dihydroxy-5-methoxy bibenzyl), 3,3′,5-trimethoxybibenzyl, aloifol-I (3′,4-dihydro
Publikováno v:
Phytochemistry. 42:1157-1161
The orchid Agrostophyllum khasiyanum , which earlier yielded agrostophyllin (7-hydroxy-2,6-dimethoxy-5 H -phenanthro[4,5- bcd ]pyran), on further chemical investigation has now yielded four more new stilbenoids, besides imbricatin (2,7-dihydroxy-6-me
Publikováno v:
Phytochemistry. 40:271-274
A new dihydrochalcone derivative, lusianin, two other known chalcones and a phenanthrene derivative were isolated from the orchid Lusia volucris. The two chalcones and the phenanthrene derivative were characterized as 2-propene-1-one-1-(2′,4′-dih
Publikováno v:
Phytochemistry. 39:649-653
Callosin and callosinin, two new stilbenoids, were isolated from the orchid Agrostophyllum callosum , which also afforded, 4-hydroxy-3,5-dimethoxybenzoic acid, orchinol, 6-methoxycoelonin, imbricatin, flaccidin, oxoflaccidin, iso-oxoflaccidin, flacci
Autor:
Sabari Ghosal, P.L. Majumder
Publikováno v:
Phytochemistry. 35:205-208
From the orchid, Arundina bambusifolia, were isolated two new stilbenoids, arundin and arundinin, besides p-hydroxybenzaldehyde, batatasin III, lusianthridin, flavanthrin, flavidin and the polyphenyl propanoid-malonate-derived compound 3,3′-dihydro