@article{araya-maturana_gavín-sazatornil_heredia-moya_pessoa-mahana_weiss-lópez_2005,  title={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},  volume={16},  ISSN={0103-5053},  url={https://doi.org/10.1590/S0103-50532005000400028},  DOI={10.1590/S0103-50532005000400028},  number={3b},  journal={Journal of the Brazilian Chemical Society},  publisher={Sociedade Brasileira de Química},  author={Araya-Maturana, Ramiro and Gavín-Sazatornil, José A. and Heredia-Moya, Jorge and Pessoa-Mahana, Hernán and Weiss-López, Boris},  year={2005},  month={May},  pages={657–661} }