Abstract: The present invention provides an anti-cancer agent, a cancer cell death inducing agent, a protein phosphatase 2A activation enhancing agent, a protein tyrosine phosphatase 1B activation enhancing agent and the like, each containing 1,2-dipalmitoleoyl-sn-glycero-3-phosphoethanolamine as an active ingredient.

Abstract: The present invention aims to provide a compound having an anticancer action comparable or superior to that of naftopidil. A compound represented by the formula (I) wherein each symbol is as defined in the SPECIFICATION, or a pharmaceutically acceptable salt thereof, particularly 1-((2-((2-methoxyphenyl)amino)ethyl)amino)-3-(1-naphthyloxy)propan-2-ol, or a pharmaceutically acceptable salt thereof. The compound shows a cell proliferation suppressive action on a wide range of cancer cells, is useful as an anti-cancer agent, and is useful for the prophylaxis and/or treatment of cancer.