The booklet includes articles written by way of prime professionals of their respective fields of study. It offers present frontiers and destiny directions for examine according to very important discoveries made within the box of bioactive usual items. - quantity 28 is a part of a good relatives of priceless reference books - Illustrates the categories of serious discoveries that emerge from the interface of chemistry and biology - Contributions are from well-respected authors
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The portion containing the bulk triterpenes was chromatographed over Si gel with CHCla/MeOH mixtures followed by low-pressure CC on Lichroprep RP-18 with MeOH/HiO mixtures to yield four new compounds: lla-hydroxybetulinic acid (21), 6(3hydroxybetulinic acid (22), 2,3-dihydroxylup-12-en-28-oic acid 3-(3\4*- 45 dihydroxybenzoyl ester) (23), and 2,3,27-trihydroxylup-12-en-28-oic acid 3-(3\4*-dihydroxybenzoyl ester) (24) [see Fig. (3)]. The following constituents of known structures were also obtained: p-sitosterol 3-(9-(3D-glucopyranoside (13), ursolic acid 3-(9-a-L-arabinopyranoside (25), euscaphic acid 28-p-D-glucopyranosyl ester (26), tormentic acid 28-|3-Dglucopyranosyl ester (27), 2a-hydroxyursolic acid (10), 2a,3adihydroxyurs-12-ene-28-oic acid (28), euscaphic acid (29), tormentic acid (30), and maslinic acid (12).
1984, 689-692. ; Botta, B. Phytochemistry, 1995,39,575-580. ; Nakanishi, K. Heterocycles, 1981, 75, 1163-1170. ; Cheih, C. Phytochemistry, 1990,29,2738-2740. E. Phytochemistry, 1982,21,2107-2109. ; Namba, T. Phytochemistry, 1995, 40, 945-947. ; Okuda, T. Chem. Pharm. Bull, 1988, 36, 2090-2097. N. , 1983,24, 3013-3016. ; Sii2aiki, T. Agric. , 1991,55,1333-1341. -N. , 1999, 62, 1033-1035. -N. Phytochemistry, 1997, 44, 943-947. M. Tetrahedron, 1991, 47, 79918000. S. Phytochemistry, 1989,28,3564-3566.
Bioactive Natural Products Part I by Atta-ur-Rahman