Lignan derivatives from the stem bark of Syzygium cumini (L.) Skeels.
Phytochemical investigation of the stem bark of Syzygium cumini (L.) Skeels (Myrtaceae) yielded four new lignan derivatives characterised as (7alpha,8alpha,2'alpha)-3,4,5-trimethoxy-7,3',1',9'-diepoxylignan (cuminiresinol), (7alpha,7'alpha,8alpha,8'alpha)-3,4-dioxymethylene-3',4'-dimethoxy-7,9',7',9-diepoxylignan-5'-ol (5'-hydroxy-methyl-piperitol), (7alpha,7'alpha,8alpha,8'alpha)-3'-methoxy-9-oxo-7,9',7',9-diepoxylignan-3,4,4'-triol or 3-demethyl-9-oxo-pinoresinol (syzygiresinol A), (7alpha,7'alpha,8alpha,8'alpha)-9-oxo-7,9',7',9-diepoxylignan-3,4,3',4',5'-pentaol or 3,3'-didemethyl-9-oxo-pinoresinol (syzygiresinol B) along with the known lignans di-demethyl-5-hydroxypinoresinol, dimethylpinoresinol, didemethoxypinoresinol, pinoresinol and 4'-methyl-5'-hydroxypinoresinol. The structures of these lignans were elucidated on the basis of structural data analysis and chemical reactions.
Mir
Qurat Y
QY
Faculty of Pharmacy, Phytochemistry Research Laboratory, Department of Pharmacognosy and Phytochemistry, Hamdard University, New Delhi, India.
Ali
M
M
Alam
Prawez
P
D017705:Lignans / Q000737:chemistry*; D015394:Molecular Structure; D024301:Plant Bark / Q000737:chemistry*; D018547:Plant Stems / Q000737:chemistry*; D027842:Syzygium / Q000737:chemistry*
D017705:Lignans