Bioactivity-guided isolation of laevicarpin, an antitrypanosomal and anticryptococcal lactam from Piper laevicarpu (Piperaceae) - Maciel, Dayany da Silva Alves; Freitas, Viviane P; Conserva, Geanne A. Alves; Alexandre, Tatiana R; Purisco, Sonia U; Tempone, André Gustavo; Melhem, Márcia Souza C; Kato, Massuo Jorge; Guimarães, Elsie Franklin; Lago, João Henrique Ghilardi (Fitoterapia, 2016)