title: New phenethyl alcohol glycosides from Stachys parviflora.
abstract: 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.
authors.affiliation: HEJ Research Institute of Chemistry, International Centre for Chemical Sciences, University of Karachi, 75270, Karachi, Pakistan. vuahmad@cyber.net.pk
authors.forename: Viqar Uddin
authors.initials: VU
authors.lastname: Ahmad
authors.forename: Saima
authors.initials: S
authors.lastname: Arshad
authors.forename: Sadia
authors.initials: S
authors.lastname: Bader
authors.forename: Amir
authors.initials: A
authors.lastname: Ahmed
authors.forename: Shazia
authors.initials: S
authors.lastname: Iqbal
authors.forename: Rasool Buksh
authors.initials: RB
authors.lastname: Tareen
mesh_terms: 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*
chemical_list: 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