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BACKGROUND Suicide is a serious and increasing problem worldwide. The emergence of the digital world has had a tremendous impact on people's lives, both negative and positive, including an impact on suicidal behaviors. OBJECTIVE Our aim was to perform a review of the published literature on Web-based suicide prevention strategies, focusing on their… (More)
A new prenyl chalcone, gemichalcone C (1), was isolated from the heartwood and root of Hypericum geminiflorum. Three new xanthones-6, 7-dihyroxy-1,3-dimethoxyxanthone (2), 4-hydroxy-1, 2-dimethoxyxanthone (3), and gemixanthone A (4)-and four known xanthones were isolated from the leaves and stems of the same plant.