List of Articles Bifurcated intramolecular hydrogen bond Open Access Article Abstract Page Full-Text 1 - Tautomeric behaviors of 5-arylazobarbituric acids in different concentrations Nader Noroozi Pesyan Jabbar Khalafy Karim Akbari Dilmaghani, Saeed Rastgar, Zahra Malekpoor, Mina Mohammadzadeh