Chemical constituents from the Paraguayan medicinal plant, Eupatorium macrocephalum Less.

This is the first phytochemical study of Eupatorium macrocephalum describing the isolation and identification of six triterpenes, one diterpene glycoside ester, six steroids, one flavonoid known as cirsilol, and six cinnamic acids derivatives. The structures of these known compounds were determined by spectral data analysis and comparison with literature values.