The bioguided fractionation of the crude extracts of Lychnophora passe
rina (Mart. ex DC) Gardn., L. pinaster Mart. and L. trichocarpha Spren
g. led to the isolation of four compounds active against the trypomast
igote forms of Trypanosoma cruzi: the sesquiterpene lactones goyazenso
lide (1), eremantholide C (2), and lychnopholide (3) and a new caryoph
yllene derivative, which was named lychnophoic acid (4).