Patent ID: 8841265

Claim:
A method for inhibiting ovarian or skin cancer cell growth in a subject comprising administering to the subject an effective amount of a compound, or its salt or ester thereof, selected from formula, wherein R1 is selected from a group consisting of alkanoyl, alkenoyl, acyl, and sugar moiety with alkenoyl; and R2 is selected from a group consisting of hydrogen, alkanoyl, alkenoyl, acyl, and sugar moiety with alkenoyl; R3 represents H or OH; R4 is selected from a group consisting of CH2OH, and CH2Oacyl; R5 represents hydrogen; R7 is OH; and each of positions 23, 24, 25, 26, 29, 30 of the compound is a methyl group, wherein each methyl group may be independently substituted with alkyl or hydroxyl group; wherein the alkanoyl is acetyl; wherein the alkenoyl is angeloyl; wherein the acyl is acetyl or angeloyl.