A neo-clerodane glucoside and neo-clerodane diterpenoids from Teucrium flavum subsp. Glaucum |
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Authors: | Giuseppe Savona Franco Piozzi Orietta Servettaz Benjamín Rodríguez Francisco Fernández-Gadea Manuel Martín-Lomas |
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Institution: | 1. Dipartimento di Biologia, Università di Milano, Italy;2. lnstituto de Química Orgánica, CSIC., Juan de la Cierva 3, Madrid-6, Spain |
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Abstract: | From the aerial part of Teucrium flavum subsp. glaucum a new neo-clerodane diterpenoid, teuflavin, and a new 19-nor-neo-clerodane glucoside, teuflavoside, have been isolated, besides the previously known diterpene teuflin. The structures of teuflavin (19-acetoxy-4α,18:15,16-diepoxy-6β-hydroxy-3-keto-neo-cleroda-13(16),14-diene-20,ξ,12S-hemiacetal) and teuflavoside (18-acetoxy-15,16-epoxy-19-nor-neo-cleroda-4,13(16),14-trien-20,12S-olid-6β-yl-2′-O-acetyl-β-d-glucopyranoside) were established by chemical and spectroscopic means and by correlation with known compounds. In addition, the previously known flavone salvigenin has also been obtained from the same source. |
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Keywords: | Labiatae diterpenoids diterpenoid glucoside neo-clerodane derivatives teuflavoside teuflavin teuflin |
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