New phenethyl alcohol glycosides from Stachys parviflora.
Phytochemical investigations of the whole plant of Stachys parviflora (Lamiaceae) resulted in the isolation of two new phenethyl alcohol glycosides. The structures of the new compounds named parviflorosides A and B were established as 2-(3,4-dihydroxyphenyl)-ethyl-O-alpha-L-rhamnopyranosyl-(1 --> 2)-4-O-E-caffeoyl-beta-D-glucopyranoside (1) and 2-(3,4-dihydroxyphenyl)-ethyl-O-alpha-L-rhamnopyranosyl-(1 --> 2)-6-O-E-caffeoyl-beta-D-glucopyranoside (2), respectively. The structure elucidation of the new compounds was based primarily on 1D and 2D NMR analysis, including COSY, HMBC and HMQC correlations.
Ahmad
Viqar Uddin
VU
HEJ Research Institute of Chemistry, International Centre for Chemical Sciences, University of Karachi, 75270, Karachi, Pakistan. vuahmad@cyber.net.pk
Arshad
Saima
S
Bader
Sadia
S
Ahmed
Amir
A
Iqbal
Shazia
S
Tareen
Rasool Buksh
RB
D006027:Glycosides / Q000737:chemistry* / Q000302:isolation & purification*; D015394:Molecular Structure; D010626:Phenylethyl Alcohol / Q000031:analogs & derivatives* / Q000737:chemistry* / Q000302:isolation & purification*; D031366:Stachys / Q000737:chemistry*
C511910:2-(3,4-dihydroxyphenyl)-ethyl-O-alpha-L-rhamnopyranosyl-(1- 2)-4-O-E-caffeoyl-beta-D-glucopyranoside; C511909:2-(3,4-dihydroxyphenyl)-ethyl-O-alpha-L-rhamnopyranosyl-(1- 2)-6-O-E-caffeoyl-beta-D-glucopyranoside; D006027:Glycosides; D010626:Phenylethyl Alcohol