NEW MATERIAL:A compound shown by the formula I (R1 and R2 are 9W10C aliphatic hydrocarbon; R3, R4, and R5 are H, lower alkyl, or linked to N atom to form cyclic ammonia group).

EXAMPLE: 2,3-Didecyloxypropyl 2-trimethylammonioethyl phosphate.

USE: An antitumor agent.

PREPARATION: For example, a compound (e.g., 2,3-didecylglycerol, etc.) shown by the formula II is reacted with a compound (e.g., 2-bromoethyldichloridate, etc.) shown by the formula III to give a compound shown by the formula IV, which is hydrolyzed and reacted with a tertiary amino compound (e.g., trimethylamine, etc.) shown by the formula V to give a compound shown by the formula I .