RESUMEN

In this paper, a complete 1 H and 13 C NMR data assignment of ent-polyalthic acid, a biologically active labdane-type diterpene, is presented. The assignments were carried on the basis of spectroscopic data from 1 H NMR, 13 C{1 H} NMR, gCOSY, gHMQC, and gHMBC experiments. Furthermore, a software-assisted methodology, using FOMSC3_rm_NB and NMR_MultSim programs, supported the detailed and unequivocal assignment of 1 H and 13 C signals, allowing all hydrogen coupling constants to be determined and thus clarifying all hydrogen signal multiplicities.

Asunto(s)

Diterpenos , Protones , Isótopos de Carbono/química , Diterpenos/química , Espectroscopía de Resonancia Magnética/métodos