Related Experiment Video
Updated: Jul 11, 2026

Nuclear Magnetic Resonance Spectroscopy for the Identification of Multiple Phosphorylations of Intrinsically Disordered Proteins
Published on: December 27, 2016
Automatic identification by 13C NMR of substituent groups bonded in natural product skeletons
Marcelo J P Ferreira1, Francimeiry C Oliveira, Sandra A V Alvarenga
1Instituto de Química, Universidade de São Paulo, Brazil.
Abstract:
The aim of this paper is to present a procedure that utilizes 13C NMR for identification of substituent groups which are bonded to carbon skeletons of natural products. For so much was developed a new version of the program MACRONO, that presents a database with 161 substituent types found in the most varied terpenoids. This new version was widely tested in the identification of the substituents of 60 compounds that, after removal of the signals that did not belong to the carbon skeleton, served to test the prediction of skeletons by using other programs of the expert system SISTEMAT.
Related Concept Videos
¹H NMR: Complex Splitting
Splitting diagrams or splitting tree diagrams are routinely used to depict such complex couplings. While drawing splitting diagrams, the splitting with the larger coupling constant is usually applied first.
Carbon-13 (¹³C) NMR: Overview
¹³C NMR: Distortionless Enhancement by Polarization Transfer (DEPT)
2D NMR: Heteronuclear Single-Quantum Correlation Spectroscopy (HSQC)
NMR Spectroscopy of Aromatic Compounds
¹³C NMR: ¹H–¹³C Decoupling
A broadband decoupling technique is used to simplify these complex, sometimes overlapping, signals. Broadband decoupling relies on a...

