Patent ID: 7312232

Claim:
A method for the treatment of a cell proliferative disease comprising administering to an animal a pharmacologically effective dose of a compound having a structural formula: wherein X is oxygen, nitrogen or sulfur; Y is oxygen, NH or NCH 3 ; R 1 is —(CH 2 ) 1-5 CO 2 H, —(CH 2 ) 7 CO 2 H, —CH 2 CONH 2 , —CH 2 CO 2 CH 3 , —CH 2 CON(CH 2 CO 2 H) 2 , —(CH 2 ) 2 OH, —(CH 2 ) 3 NH 3 Cl, or —(CH 2 ) 2 OSO 3 NHEt 3 ; R 2 and R 3 are independently —H or —CH 3 ; R 4 methyl; R 5 is —C 17 H 35 (unbranched), —C 13 H 27 (unbranched), —C 7 H 15 (unbranched), —CH 3 , —CO 2 H, with the proviso that R 1 can not be —(CH 2 ) 3 CO 2 H nor —(CH 2 ) 2 OH when R 2 , R 3 , R 4 are each —CH 3 , X and Y are each oxygen and R 5 is a pharmaceutical composition thereof.