Dihydrochelerythrine is a natural compound isolated from the leaves of Macleaya microcarpa; has antifungal activity.IC50 value:Target: in vitro: Dihydrochelerythrine showed the highest antifungal activity against B. cinerea Pers, with 98.32% mycelial growth inhibition at 50 μg/mL. Dihydrochelerythrine inhibited spore germination in vitro in a concentration-dependent manner [1]. Dihydrochelerythrine appeared to be less cytotoxic since the viability of cells exposed to 20 microM dihydrochelerythrine for 24h was reduced only to 53%. A dose-dependent induction of apoptosis and necrosis by chelerythrine and dihydrochelerythrine was confirmed by annexin V/propidium iodide dual staining flow cytometry [2]. Dihydrochelerythrine (4) exhibited strong activity against methicillin-resistant Staphylococcus aureus SK1 and moderate activity against Escherichia coli TISTR 780 with MIC values of 8 and 16 μg/mL, respectively [3].

[1]. Feng G, et al. Inhibitory activity of dihydrosanguinarine and dihydrochelerythrine against phytopathogenic fungi. Nat Prod Res. 2011 Jul;25(11):1082-9. [2]. Vrba J, et al. Chelerythrine and dihydrochelerythrine induce G1 phase arrest and bimodal cell death in human leukemia HL-60 cells. Toxicol In Vitro. 2008 Jun;22(4):1008-17. [3]. Tantapakul C, et al. Antibacterial compounds from Zanthoxylum rhetsa. Arch Pharm Res. 2012 Jul;35(7):1139-42.