Investigation of anti-inflammatory and antinociceptive activities of trans-dehydrocrotonin, a 19-nor-clerodane diterpene from Croton cajucara. Part 1 - Carvalho,J.C.; Silva,M.F.; Maciel,M.AM.; Pinto,A.C.; Nunes,D.S.; Lima,R.M.; Bastos,J.K.; Sarti,S.J. (Planta Medica, 1996)