[1] Prince Songkla Univ, Fac Sci, Dept Chem, Hat Yai 90112, Thailand
[2] Prince Songkla Univ, Fac Sci, Dept Microbiol, Hat Yai 90112, Thailand
[3] Prince Songkla Univ, Fac Sci, Dept Biol, Hat Yai 90112, Thailand
[4] Univ Sydney, Sch Chem, Sydney, NSW 2006, Australia