From the aerial parts of Marrubium thessalum, four labdane diterpenes, 13S-preperegrinine, 3α-hydroxymarrubiin, 9α,13R-15,16-bisepoxy-15β-methoxy-3-oxo-labdan-6β,19-oli de and 15-methoxyvelutine C, have been isolated together with four known diterpenes and one methoxylated flavone, ladanein. The structures of the isolated compounds were established by means of NMR (COSY, HSQC, HMBC, NOESY, and ROESY) and MS spectral analyses. Complete NMR assignments are reported for 13R-preperegrinine. Characteristic compounds of the plant were peregrinine and ladanein. © 2009 Elsevier Ltd. All rights reserved.
Labdane diterpenes from Marrubium thessalum
Karioti A.;
2009-01-01
Abstract
From the aerial parts of Marrubium thessalum, four labdane diterpenes, 13S-preperegrinine, 3α-hydroxymarrubiin, 9α,13R-15,16-bisepoxy-15β-methoxy-3-oxo-labdan-6β,19-oli de and 15-methoxyvelutine C, have been isolated together with four known diterpenes and one methoxylated flavone, ladanein. The structures of the isolated compounds were established by means of NMR (COSY, HSQC, HMBC, NOESY, and ROESY) and MS spectral analyses. Complete NMR assignments are reported for 13R-preperegrinine. Characteristic compounds of the plant were peregrinine and ladanein. © 2009 Elsevier Ltd. All rights reserved.File in questo prodotto:
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