Unedoside derivatives in Nuxia and their biosynthesis
1998; Elsevier BV; Volume: 47; Issue: 6 Linguagem: Inglês
10.1016/s0031-9422(98)80062-9
ISSN1873-3700
AutoresSøren Rosendal Jensen, Lene Ravnkilde, Jan Schripsema,
Tópico(s)Plant and Fungal Species Descriptions
ResumoAn investigation of two species of Nuxia showed that this genus is characterized by the presence of the eight-carbon iridoid glucoside unedoside and/or its derivatives. From N. floribunda unedoside, nuxioside (6-O-α-l-rhamnopyranosyl-unedoside) and 2″-acetyl-3″-cinnamoyl-nuxioside were isolated, while from N. oppositifolia 2″-acetyl-3″-benzoyl-nuxioside was obtained. Both plants contained verbascoside. The biosynthesis of unedoside in N. floribunda was investigated and deoxyloganic acid was found to be a precursor, similar to what was found for the eight-carbon iridoids in Thunbergia alata earlier investigated. The taxonomic position of Nuxia and Buddlejaceae is briefly discussed.
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