TY - JOUR T1 - Long-range correlations ( n j C,H n > 3 ) in the HMBC spectra of 3-(4-oxo-4H-chromen-3-YL)-acrylic acid ethyl esters JO - Journal of the Brazilian Chemical Society A1 - Araya-Maturana, Ramiro A1 - Gavín-Sazatornil, José A. A1 - Heredia-Moya, Jorge A1 - Pessoa-Mahana, Hernán A1 - Weiss-López, Boris SN - 0103-5053 UL - 10.1590/S0103-50532005000400028 VL - 16 Y1 - 2005 PB - Brasil ER -