The chemical investigation of n-butanol fraction (BF) from the leaves of Zanthoxylum naranjillo (Rutaceae) by open column and preparative HPLC resulted in the isolation of magnoflorine (1), apigenin-6-C-β-D-glucopyranoside (2) and apigenin-8-C-β-D-glucopyranoside (3). This is the first time that the presence of compounds 1 to 3 in Z. naranjillo has been reported. Compounds 1 to 3 and BF were screened in vitro against Schistosoma mansoni adult worms. The results indicated that BF and compound 3 were able to separate coupled S. mansoni adult worms.