Evaluation of DNA-damaging activity of benzopyran and prenylated benzoic acid from Piper aduncum Sw - Baldoqui, D C; Kato, Massuo Jorge; Cavalheiro, Alberto José; Bolzani, Vanderlan da Silva; Young, Maria Claudia Marx; Furlan, Maysa (Phytochemical Society of North America Annual Meeting, 1998)