Minumicrolin and murrangatin are the diastereomeric isomers. They are 8-substituted 7-methoxycoumarins isolated from Murraya species. They were found to significantly inhibit EBV-EA activation, and preserved the high viability of Raji cells, suggesting that they might be valuable anti-tumor-promoting agents. Minumicrolin showed mild butyrylcholinesterase inhibition activity. It exhibited cytotoxicity against cholangiocarcinoma cell line, KKU-100.