Detailed 'ANTIPOT.1H' and 'ANTIPOT.13C'NMR structural assignement of three biologically active lignan lactones - Heleno, Vladimir Constantino Gomes; Silva, Rosangela da; Pedersoli, Susimaire; Albuquerque, Sérgio de; Bastos, Jairo Kenupp; Silva, Márcio Luis Andrade e; Donate, Paulo Marcos; Silva, Gil Valdo José da; Lopes, João Luís Callegari (Spectrochimica Acta Part A, 2006)