Patent ID: 8158809

Claim:
A compound selected from the group consisting of podophyllotoxin-4-O-ester of 4-fluorophenoxyacetic acid; podophyllotoxin-4-O-ester of 4-bromophenoxyacetic acid; podophyllotoxin-4-O-ester of 4-iodophenoxyacetic acid; podophyllotoxin-4-O-ester of 3-chlorophenoxyacetic acid; podophyllotoxin-4-O-ester of 4-chloro-2-methylphenoxyacetic acid; podophyllotoxin-4-O-ester of 4-formylphenoxyacetic acid; podophyllotoxin-4-O-ester of 4-methoxyphenoxyacetic acid; podophyllotoxin-4-O-ester of 2,4-dichlorophenoxyacetic acid; podophyllotoxin-4-O-ester of 7-(carboxymethoxy)-3-chloro-4-methylcoumarin; podophyllotoxin-4-O-ester of 4-(4-dichloroethylamino)phenylbutyric acid; podophyllotoxin-4-O-ester of (+)-menthoxyethanoic acid; podophyllotoxin-4-O-ester of 2-(((2,4,5,7-tetranitro-9H-fluoren-9-ylidene)amino)oxy)propionic acid; and podophyllotoxin-4-O-ester of N—BOC-erythro-D-β-methylphenylalanine.