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Iridoids from Verbascum nigrum
Author(s) -
Vesper Thorsten,
Seifert Karlheinz
Publication year - 1994
Publication title -
liebigs annalen der chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.825
H-Index - 155
eISSN - 1099-0690
pISSN - 0170-2041
DOI - 10.1002/jlac.199419940718
Subject(s) - aucubin , iridoid , chemistry , botany , stereochemistry , glycoside , biology
In addition to the known 6‐ O ‐{ 3 ‐ O ‐[( E )‐ p ‐coumaroyl]‐α‐ L ‐rhamnopyranosyl}aucubin ( 2 ) three novel acyl iridoid diglycosides 3–5 have been isolated from the aerial parts of Verbascum nigrum. On the basis of their spectral data the structures of these iridoids have been elucidated as 6‐ O ‐{2‐ O ‐[( E )‐ p ‐coumaroyl]‐α‐ L ‐rhamnopyranosyl}aucubin ( 3 , nigroside III), 6‐ O ‐{ 3 ‐ O ‐[( E )‐isoferuloyl]‐α‐ L ‐rhamnopyranosyl‐} aucubin ( 4 , nigroside IV) and 6‐ O ‐{ 2 ‐ O ‐[( E )‐isoferuloyl]‐α‐ L ‐rhamnopyranosyl}aucubin ( 5 , nigroside V).