Mangrove endophytic fungi

Penicillium

sp.  H1N1 from Dongzhai Harbor of Hainan Province was fermented by liquid culture

and four compounds were isolated and purified by various chromatographic purification methods. Their structures were identified as 8-hydroxy-6-methyl-xanthone-1-carboxylate (1)，8-hydroxy-6-methyl-xanthone-1-carboxylic acid (2)，8-hydroxy-6-methyl-xanthone-1-carboxylate  (3) and 4′

6-dihydrooxyaurone（4)，respectively. Furthermore

the structure of compound 1 was also confirmed by X-ray diffraction. Compound 4 was obtained from Mangrove endophytic fungi for the first time

providing a new natural source of aurones.