Abstract
Two new brominated selinane sesquiterpenes, 1-bromoselin-4(14),11-diene (1) and 9-bromoselin-4(14),11-diene (2), one known cadinane sesquiterpene, cadalene (3), and four known selinane sesquiterpenes, α-selinene (4), β-selinene (5), β-dictyopterol (6), and cyperusol C (7), were isolated from a sample of marine brown alga Dictyopteris divaricata collected off the coast of Yantai (China). Their structures were established by detailed MS and NMR spectroscopic analysis, as well as comparison with literature data.
Highlights
The marine brown alga Dictyopteris divaricata, found widely spread along the coasts of China, has provided many structurally interesting sesquiterpenes and norsesquiterpenes [1,2,3,4]
To date there have been no reports of halogenated structures isolated from this species
Drugs 2009, 7 investigation of the secondary metabolites of D. divaricata collected off the coast of Yantai has revealed two new brominated sesquiterpenes, 1-bromoselin-4(14),11-diene (1) and
Summary
The marine brown alga Dictyopteris divaricata, found widely spread along the coasts of China, has provided many structurally interesting sesquiterpenes and norsesquiterpenes [1,2,3,4]. To date there have been no reports of halogenated structures isolated from this species. Mar. Drugs 2009, 7 investigation of the secondary metabolites of D. divaricata collected off the coast of Yantai has revealed two new brominated sesquiterpenes, 1-bromoselin-4(14),11-diene (1) and. 9-bromoselin-4(14),11-diene (2), one known cadinane sesquiterpene, cadalene (3) [5], and four known selinane sesquiterpenes, α-selinene (4) [6], β-selinene (5) [6], β-dictyopterol (6) [7], and cyperusol C (7) [8]. The isolation and structural determination of compounds 1–7 are the subject of this paper
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