作者:Hugo E. Gottlieb、Sandeep Kumar、Mahendra Sahai、Anil B. Ray
DOI:10.1016/0031-9422(91)83676-c
日期:1991.1
The leaves of Flueggea microcarpa contain the ethyl ester of brevifolin carboxylic acid. The elucidation of the structure of this isocoumarin involved extensive use of H-1 and C-13 NMR data, which are fully reported and analysed for the first time; especially useful were long-range C-H coupling interactions. NMR parameters for some models, including norbergenin, as well as pyrogallol, gallic acid and their triacetates, are also reported.