Key Laboratory of Economic Plants and Biotechnology;
Kunming Institute of Botany;
Chinese Academy of Sciences;
Kunming 650201;
China;
College of Resources and Environmental Sciences;
Hebei Agricultural University;
Hebei 071000;
China;
State Key Laboratory of Phytochemisty and Plant Resources in West China;
Kunming Institute of Botany;
Chinese Academy of Sciences;
Kunming 650201;
China;
College of Life and Environmental Sciences;
Minzu University of China;
Beijing 100081;
China;
Piperaceae; Piper longum; amide alkaloids; piperlongumamides; piperchabamide B; cytotoxicity;