A new triterpene metabolite with an oleanane skeleton, has been isolated from Anagallis arvensis and its structure established on the basis of spectral analyses (including 1H-1H and 1H-13C COSY), performed both on the original compound and its acid-catalysed hydrolysis product. A single crystal X-ray diffraction analysis performed on the p-iodobenzoate derivative enabled the assignment of the absolute configuration.