This paper reports the synthesis and pharmacological evaluation of some compounds, obtained by structural modifications of 1, 2, 3-triazolyl-benzotriazoles and 1, 2, 3-triazolyl- benzimidazolones, which had shown activity as potential activators of the big-conductance calcium-activated potassium channels (BKCa). Changes have concerned the introduction of a hinderer substituent in the 5-position of the benzimidazolone (4a, b) and benzotriazole ( ...