69484-83-9Relevant academic research and scientific papers
6-O-α-L-(2''-O- AND 3''-O-ISOFERULOYL)RHAMNOPYRANOSYLCATALPOLS FROM PREMNA JAPONICA
Otsuka, Hideaki,Sasaki, Yukari,Yamasaki, Kazuo,Takeda, Yoshio,Seki, Tarow
, p. 3069 - 3072 (2007/10/02)
From the methanol extract of the leaves of Premna japonica, two new monoacyl 6-O-α-L-rhamnopyranosylcatalpols were isolated.The structures of these compounds were determined to be 6-O-α-L-(2''-O-isoferuloyl and 3''-O-isoferuloyl)rhamnopyranosylcatalpols by NMR spectroscopy and chemical conversions.Key Word Index - Premna japonica; Verbenaceae; iridoid; 6-O-α-L-(rhamnopyranosylcatalpol; 6-O-α-L-(2''-O-isoferuloyl) rhamnopyranosylcatalpol; 6-O-α-L-(3''-O-isoferuloyl) rhamnopyranosylcatalpol.
IRIDOIDS OF Verbascum georgicum
Agababyan, E. Yu.,Arutyunyan, L. S.,Mnatsakanyan, V. A.,Gach-Baitts, E.,Radich, L.
, p. 412 - 417 (2007/10/02)
From the epigeal part of Verbascum georgicum Benth., in addition to aucubin, as the main component of the total iridoids a new iridoid has been isolated - 6-α-L-(4'-p-methoxy-trans-cinnamoyl)rhamnopyranosylcatalpol, the structure of which has been shown by UV, PMR, and mass spectroscopy and a comparison of the 13C NMR spectrum with that of 6-α-L-rhamnopyranosylcatalpol (I).The presence of catalpol (II) in the plant has been shown by PC and TLC.
