title: Automatic identification by 13C NMR of substituent groups bonded in natural product skeletons.
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.
authors.affiliation: Instituto de Química, Universidade de São Paulo, Brazil.
authors.forename: Marcelo J P
authors.initials: MJ
authors.lastname: Ferreira
authors.forename: Francimeiry C
authors.initials: FC
authors.lastname: Oliveira
authors.forename: Sandra A V
authors.initials: SA
authors.lastname: Alvarenga
authors.forename: Patrícia A T
authors.initials: PA
authors.lastname: Macari
authors.forename: Gilberto V
authors.initials: GV
authors.lastname: Rodrigues
authors.forename: Vicente P
authors.initials: VP
authors.lastname: Emerenciano
mesh_terms: D001685:Biological Factors / Q000737:chemistry*; D002247:Carbon Isotopes; D016208:Databases, Factual; D009682:Magnetic Resonance Spectroscopy; D013729:Terpenes / Q000737:chemistry
chemical_list: D001685:Biological Factors; D002247:Carbon Isotopes; D013729:Terpenes