Two New Bis-styryl Compounds from Miliusa balansae

Two new compounds named miliubisstyryl A and miliubisstyryl B were isolated from leaves and branches of Miliusa balansae Fin. & Gagn. (Annonaceae) in addition to octacosanoic acid. Their structures were elucidated by spectroscopic methods, especially 2D NMR spectroscopy. The rare cyclobutane skeletons of these compounds are derived from a styryl compound which is also present in this plant.