These evidences have encouraged several research groups to study the synthesis and biological properties of new psoralen derivatives, including benzopsoralens [12e15]. These compounds were found to be effective in inhibiting the in vitro growth of different human tumor cell lines [16,17]. The synthesis of compounds, containing an ester group in the position 3 of the pyranone ring such as ethyl 3-oxo-3H-benzofuro[3,2-f]-1-benzopyran-2-carboxylate has also been described [18]. The angular compounds ethyl 3-oxo-3H-benzofuro[3,2-f]-1-benzopyran-2-carboxylate and ethyl 2-oxo-2H-benzofuro[2,3-h]-1-benzopyran-3-carboxylate showed the most promising results on tumor cell lines [19], being the former the most active. Thus, in the current work this compound was hydrolyzed to the corresponding acid and its amide analogues were prepared, as well as the derivative unsubstituted in position 3 of the pyrone ring, to evaluate the effect of the structure variation on their biological activity. These results were complemented with molecular docking studies with human-CYS2A6 enzymes to evaluate the analogues potential to interact with the heme group of the enzymes.