Automatic Identification by 13C NMR of Substituent Groups Bonded in Natural Product Skeletons. - Marcelo J. P. Ferreira; Francimeiry C. Oliveira; Sandra A. V. Alvarenga; Patrícia A. T. Macari; Gilberto V. Rodrigues; Vicente de Paulo Emerenciano (Comput. Chem., 2002)