TUMOR SUPPRESSOR

摘要

A compound having a structure of propanedioic acid represented by the following formula (1): (1) (wherein the ring A represents oxazole or the like; R<SUB>1</SUB> represents an alkyl group, a lower alkoxy group or the like; R<SUB>2</SUB> and R<SUB>3</SUB> represent a lower alkyl group or the like; m represents 0 or an integer of 1 to 4, and m pieces of R<SUB>1</SUB> may be the same or different from each other; and W represents an integer of 3 to 5) is useful as an agent for preventing or treating a gastrointestinal polyp and/or a malignant tumor or an agent for preventing metastasis thereof.