5-Fluorouracil derivatives and antitumor preparations containing the same

摘要

Novel 5-fluorouracil derivatives of the general formula: <IMAGE> wherein R1, R2 and R3 each represent hydrogen atom or methyl group, and R4 represents a straight or branched alkyl or alkenyl group, which has low toxicity and improved antitumor activity, and novel antitumor preparations containing the said 5-fluorouracil derivative.