New phenethyl alcohol glycosides from Stachys parviflora |
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| Authors: | Viqar Uddin Ahmad Saima Arshad Sadia Bader Amir Ahmed Shazia Iqbal Rasool Buksh Tareen |
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| Affiliation: | 1. University of Karachi, HEJ Research Institute of Chemistry, International Centre for Chemical Sciences , 75270, Karachi, Pakistan vuahmad@cyber.net.pk;3. University of Karachi, HEJ Research Institute of Chemistry, International Centre for Chemical Sciences , 75270, Karachi, Pakistan;4. Balochistan University, Department of Botany , Quetta, Pakistan |
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| 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-α-l-rhamnopyranosyl-(1 → 2)-4-O-E-caffeoyl-β-d-glucopyranoside (1) and 2-(3,4-dihydroxyphenyl)-ethyl-O-α-l-rhamnopyranosyl-(1 → 2)-6-O-E-caffeoyl-β-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. |
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| Keywords: | Stachys parviflora Lamiaceae Phenethyl alcohol glycosides 1D NMR spectroscopy 2D NMR spectroscopy |
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