Direct proof by ‘ANTPOT.13 C'-nuclear magnetic resonance of semi-purified extract and isolation of ent-Catechin from leave of Eucalyptus cinerea - Silva, Sayonara Mendes; Abe, Simone Yae; Bueno, Fernanda Giacomini; Lopes, Norberto Peporine; Mello, João Carlos Palazzo de; Nakashima, Tomoe (Pharmacognosy Magazine, 2014)