"withdrawn"@en . . . . . . "Carmofur"@en . . . . . . . . . "61422-45-5"@en . . . . . . . . . . . "Carmofur is a derivative of fluorouracil, and is an antineoplastic agent that has been used in the treatment of breast and colorectal cancer. Carmofur has been known to induce leukoencephalopathy."@en . . . . . . . "U.S. Patent 4,071,519."@en . . . .