Nanik Siti Aminah, .- and Tin M. Thant, .- and Alfinda N. Kristanti, .- and Rico Ramadhan, .- and Hnin T. Aung, .- and Yoshiaki Takaya, .- (2020) Carbazomarin: A New Potential of α-Glucosidase Inhibitor From Clausena excavata Roots. Natural Product Communications, 14 (12). pp. 1-5. ISSN 15559475, 1934578X

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Abstract

Continuing our exploration for dual functions antidiabetic and antioxidant agents from Myanmar medicinal plant, a new carbazole-pyranocoumarin conjugate, carbazomarin-C (1) along with a known carbazole alkaloid, mukonine (2) and a pyranocoumarin, xanthoxyletin (3), was isolated from the roots of Clausena excavata. The chemical structures of these compounds were identified using a combination of spectroscopic methods. Among isolates, there was a strong inhibition of compounds (1) and (3) on yeast α-glucosidase in a dose-dependent manner. It was shown when p-nitrophenyl-α-d-glucopyranoside was used as a substrate in vitro with IC50 values 0.22 and 4.81 mM, respectively. However, all isolated compounds displayed no inhibition against DPPH (2,2-diphenyl-1-picrylhydrazyl) radicals.

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