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Phenolic glycosides from Dodecadenia grandiflora and their glucose-6-phosphatase inhibitory activity
Manmeet Kumar1, Preeti Rawat, Mohammad Faheem Khan
1Medicinal and Process Chemistry Division, Central Drug Research Institute, CSIR, Lucknow 226 001, India.
Abstract:
Phytochemical investigation of Dodecadenia grandiflora leaves led to the isolation and identification of three phenolic glycosides, designated 1-[(4'-O-(E)-p-coumaroyl)-beta-D-glucopyranosyl]-oxy-2-phenol (1), 1-[(6'-O-(E)-p-coumaroyl)-beta-D-glucopyranosyl]-oxy-2-phenol (2) and 1-[O-beta-D-glucopyranosyl(1-->2)-beta-D-glucopyranosyl]-oxy-2-phenol (3), along with nine known compounds. Compounds 1, 2, 5 and 9 exhibited significant glucose-6-phosphatase inhibitory activity (63.7, 66.9, 82.9 and 85.4%) with IC(50) values of 88.5, 81.0, 51 and 50 microM respectively. On the basis of biological results, a structure-activity relationship has been discussed.
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