Assignment of Carbon and Proton Chemical Shifts of Methyl Neoabietate by One- andTwo-Dimensional NMR Spectroscopy

Abstract

Summary Methyl neoabietateThe 13 C and 1 H NMR spectra of the methyl esters of neoabietic acid, a diterpene resin acid, are interDiterpene preted. All of the 13 C and 1 H chemical shifts were assigned by a combination of one-dimensional methods 2D NMR such as conventional proton decoupling, NOE difference, and DEPT; and two-dimensional experiments DEPT such as short-and long-range CH correlation. NOE difference CH-correlation