Dihydropyrimidin-(2H)-ones obtained by ultrasound irradiation: a new class of potential antioxidant agents - Stefani, Hélio Alexandre; Oliveira, Carlindo Baeta de; Almeida, Roberta Bernardo de; Pereira, Claudio Martim Pereira de; Braga, Rodolpho de Campos; Cella, Rodrigo; Borges, Vanessa Corralo; Savegnago, Lucielli; Nogueira, Cristina Wayne (European Journal of Medicinal Chemistry, 2006)