Kavalactones, mainly found in Piper methysticum, are a class of lactone compounds usually with an arylethylene-pyrone skeleton. Till now, fifty-one kavalactones have been isolated from the genera Piper, Alpinia, Amomum, Polygala, Goniothalamus, and Dumortiera. The bioactivities of six kavalactones, kawain, 7,8-dihydro- kawain, methysticin, dihydromethysticin, yangonin, and desmethoxyyagonin, have been studied extensively. This review aims to give an overview of kavalactones in the plants and their various bioactivities.

Bioactive components of marine species have received great attention in recent years, especially phlorotannins isolated from brown algae. This paper summarized progress in the structures and bioactivities of phlorotannins including antibacterial, antioxidant, anticoagulant, anti-diabetic, anti-hypertensive, inhibiting HIV, anti-tumor, anti-allergic, anti-inflammatory, defense activity, and deodorant activities.

Lindera glauca is a folk medicine with rich resources in China. Previous phytochemical studies on L. glauca have resulted in the isolation and identification of the main chemical constituents such as alkaloids, sitosterol, flavonoids, sesquiterpenes, and lignans, as well as essential oil, with antimicrobial, antitumor activity and other pharmacological effects. In this paper, the chemical compositions and pharmacological effects of L. glauca were summaried.

Methicillin-resistant Staphylococcus aureus (MRSA) is a multi-drug resistant pathogenic bacteria, which has seriously threatened human health for a long time. Therefore, there is an urgent and unmet demand for new types of antibiotics. In response to the antibiotic resistance, many researchers have studied natural products derived from plant for alternative antibiotics and therapies. In this review, we summarized recent advances on anti-MRSA natural products from plants and their potential antibacterial effect against MRSA as potential anti-MRSA agents since 2007.

Thrombosis owns the highest incidence, and it is a serious threat to human health. Currently, the clinical antithrombotic drugs suffer from several drawbacks, causing allergic reactions or complications, etc. In recent years, small-molecule compounds isolated from natural products with antithrombotic activities in the field drug research on thrombus disease. In this review, we will focus on representative naturally occurring small molecule phenols with antithrombotic potency and potential for future therapeutic regimens to combat thrombosis disease.