Villar, J.D.F. and de Oliveira, A.M. 1992. The use of long range C-H coupling in the structure determination and 13C assignment of pyrones. Eclética Química. 17, 1 (Dec. 1992), 7–16. DOI:https://doi.org/10.26850/1678-4618eqj.v17.1.1992.p7-16.