Reinvestigation of the Phenylpropanoids from the Roots of Pimpinella Species

Abstract

The roots of Pimpinella saxifraga and P. major (umbelliferae) were reexamined for their “isoeugenol” derivatives. According to high field 1H-NMR, 13C-NMR, as well as MS-studies, the hitherto described substitution pattern (4-OH, 5-OMe) must be revised to be 2-OH and 5-OMe. A fatty acid ester of a phenylpropanoid was found, its structure was elucidated by 2D-1H-NMR (1H-1H correlated COSY).