Resolution and absolute configuration assignment of a natural racemic chromane from Peperomia obtusifolia (Piperaceae) - Batista Jr., João Marcos; López, Silvia Noelí; Mota, Jonas da Silva; Vanzolini, Kenia Lourenço; Cass, Quézia Bezerra; Rinaldo, Daniel; Vilegas, Wagner; Bolzani, Vanderlan da Silva; Kato, Massuo Jorge; Furlan, Maysa (Chirality, 2009)