Chemical constituents from leaves of Uvaria microcarpa Uvarilactam, a New Lactam from Uvaria microcarpa (Annonaceae) Chemical constituents from leaves of Uvaria microcarpa A new isocoumarin isolated from endophytic fungus Arthrinium sp. A092 derived from medicinal plant Uvaria microcarpa Primary study on anticancer activity of Uvaria microcarpa in different harvest time