Iriflophenone 2-O-Rhamnoside can reduce the amount of Immunoglobulin E (IgE) secreted by human myeloma U266 cells, it has potential as an anti-allergic agent. Iriflophenone 2-O-Rhamnoside also exhibits significant cytotoxicity against three human tumor cells(A-549 lung carcinoma, MCF-7 breast adenocarcinoma and HT-29 colon adenocarcinoma ).