Seven ent-labdane diterpenes, have been isolated from Ruppia maritima. The structures 15,16-epoxy-ent-labda-8(17),13(16),14trien- 19-al; 15,16-epoxy-ent-labda-8 (17), 13(16), 14-trien- 19-ol acetate; methyl 15,16-epoxy- 12-oxo-ent-labda-8 (17), 13 (16), 14-trien-19-oate; 15,16-epoxy-ent-labd-8 (17), 13E-dien- 15-ol and 13-oxo- 15,16-bis-nor-ent-labd-8 (17)-ene have been assigned to the five new compounds by spectroscopic means and chemical correlations. The phytotoxicity of the diterpenes has been assessed using the alga Selenastrum capricornutum as organism test. (C) 2000 Elsevier Science Ltd.
Antialgal ent-labdane diterpenes from Ruppia maritima
FIORENTINO, Antonio;ISIDORI, Marina;MONACO, Pietro;
2000
Abstract
Seven ent-labdane diterpenes, have been isolated from Ruppia maritima. The structures 15,16-epoxy-ent-labda-8(17),13(16),14trien- 19-al; 15,16-epoxy-ent-labda-8 (17), 13(16), 14-trien- 19-ol acetate; methyl 15,16-epoxy- 12-oxo-ent-labda-8 (17), 13 (16), 14-trien-19-oate; 15,16-epoxy-ent-labd-8 (17), 13E-dien- 15-ol and 13-oxo- 15,16-bis-nor-ent-labd-8 (17)-ene have been assigned to the five new compounds by spectroscopic means and chemical correlations. The phytotoxicity of the diterpenes has been assessed using the alga Selenastrum capricornutum as organism test. (C) 2000 Elsevier Science Ltd.File in questo prodotto:
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