@Article{IPB-1988, author = {Thuy, T. T. and Porzel, A. and Franke, K. and Wessjohann, L. and Sung, T. V.}, title = {{Isoquinolone and protoberberine alkaloids from Stephania rotunda}}, year = {2005}, pages = {701-704}, journal = {Pharmazie}, volume = {60}, abstract = {Chemical investigation of Stephania rotunda Lour. growing in Viet Nam led to the isolation and structural elucidation of three new alkaloids, 5-hydroxy-6,7-dimethoxy-3,4-dihydroisoquinolin-1(2H)-one (1), thaicanine 4-O-β-L-glucoside (6), as well as (–)-thaicanine N-oxide (4-hydroxycorynoxidine) (8), along with 23 known alkaloids. These structures were determined on the basis of MS and NMR spectroscopic data.} }