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4 α ‐Acetoxyamijidictyol – A New Antifeeding Dolastane Diterpene from the Brazilian Brown Alga Canistrocarpus cervicornis
Author(s) -
Miguel Bianco Éverson,
Martins Francisco Thiago,
Basílio Pinheiro Carlos,
Bagueira de Vasconcellos Azeredo Rodrigo,
Laneuville Teixeira Valéria,
Crespo Pereira Renato
Publication year - 2015
Publication title -
chemistry and biodiversity
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.427
H-Index - 70
eISSN - 1612-1880
pISSN - 1612-1872
DOI - 10.1002/cbdv.201400410
Subject(s) - lytechinus variegatus , diterpene , chemistry , sea urchin , stereochemistry , zoology , botany , ecology , biology
Chemical investigation of the CH 2 Cl 2 crude extract from the brown alga Canistrocarpus cervicornis (Dictyotaceae) led to isolation of one new ( 1 ) and four previously reported dolastane diterpenes ( 2 – 5 ). Their structures were characterized by 1D‐ and 2D‐NMR spectroscopic techniques, including a full single crystal X‐ray diffraction analysis for 1, 2 , and 4 . In addition, the new structure 1 was assayed as chemical defense inhibiting the feeding by the sea urchin Lytechinus variegatus. This study constitutes an additional report broadening the known spectrum of action and defensive roles of secondary metabolites of the C. cervicornis and Dictyotales species.