Prenylated chalcones, flavone and other constituents of the twigs of Dorstenia angusticornis and Dorstenia barteri var. subtriangularis

Antimicrobial activity of the methanolic extract, fractions and four flavonoids from the twigs of Dorstenia angusticornis Engl. (Moraceae)

“…The isolation of compounds 1-4 (Fig. 1), from the twigs of this plant, was previously reported by Ngadjui et al (2005). Their antimicrobial activities as well as that of DAT and fractions are shown in Tables 1-3.…”

“…(sub-FRS 12-26 eluted with CH 2 Cl 2 ). The characterisation and structural elucidation of the isolated compounds from their UV, 1 H and 13 C NMR spectra and melting points data were reported in another previous paper of our research group (Ngadjui et al, 2005).…”

Secondary metabolites of Bagassa guianensis Aubl. wood: A study of the chemotaxonomy of the Moraceae family

“…They are widely acknowledged as a rich source of bioactive secondary metabolites, such as flavonoids, stilbenes, triterpenoids and xanthones Ngadjui et al, 2005;Han et al, 2006;Jahasinghe et al, 2008). In addition, some members, such as Maclura pomifera and B. guianensis, have very durable wood (Scheffer and Morell, 1998;Schultz et al, 1995).…”

Phytochemical and Pharmacological Studies on Species of Dorstenia Genus (2000-2016)

“…Other species have been marketed to be used as medicinal plants, such as D. ciliata, which yielded from the aerial parts two new prenylated flavones, ciliatins A (73) and B (85) [14], as well as isobavachalcone (44), stipulin 47 (42) were also found in the twigs of the Cameroonian D. turbinate [27]. Other three new prenylated chalcones were found in the twigs of D. angusticornis, which were named as angusticornin A (55), B (50), and C (91), plus stipulin (47), gancaonin Q (70), paratocarpin C (56), and paratocarpin F (79) [26,28].…”

“…This led them to work on the isolation of new 15 furanocoumarins from leaves and twigs of D. gigas [8] and leaves of D. foetida [9] The former one gave the compounds swietenocoumarin B (5), swietenocoumarin F (6), furanopinnarin (7), dimethoxychalpensin (12), isoimperatorin (19), cnidilin (20), oxypeucedanin (21), byakangelicin (32), other six monoprenylated derivatives of psoralen (8-10, 13, 14), a monogenarylated derivative of psoralen (33), and six angelicin derivatives (34)(35)(36)(37)(38)(39). From the latter one, the isolation process yielded psoralen (1), isopimpinellin (4), swietenocoumarin (5), 5-methoxychalepensin (11), turbinatocoumarin (15), malonylturbinatocoumarin (16), phellopterin (31) and other two prenylated compounds (17,18), plus five derivatives of chalepensin (22)(23)(24)(25)(26).…”