VCD to determine absolute configuration of natural product molecules: secolignans from Peperomia blanda - Felippe, Lidiane Gaspareto; Batista Junior, João Marcos; Baldoqui, Debora Cristina; Nascimento, Isabele R; Kato, Massuo Jorge; He, Yanan; Nafie, Laurence A; Furlan, Maysa (Organic & Biomolecular Chemistry, 2012)