title: Antitumor agents, 99. Synthetic ring C aromatized podophyllotoxin analogues as potential inhibitors of human DNA topoisomerase II.
abstract: Several ring C aromatized analogues of podophyllotoxin were synthesized for testing against human DNA topoisomerase II. The results indicate that aromatization of ring C gave rise to no inhibition of this enzyme at 200 microM. A comparison of the cytotoxicity among these compounds also demonstrates that a free hydroxyl group at C-4 contributes to significant cytotoxicity.
authors.affiliation: Division of Medicinal Chemistry and Natural Products, School of Pharmacy, University of North Carolina, Chapel Hill 27599.
authors.forename: S A
authors.initials: SA
authors.lastname: Beers
authors.forename: Y
authors.initials: Y
authors.lastname: Imakura
authors.forename: H J
authors.initials: HJ
authors.lastname: Dai
authors.forename: D H
authors.initials: DH
authors.lastname: Li
authors.forename: Y C
authors.initials: YC
authors.lastname: Cheng
authors.forename: K H
authors.initials: KH
authors.lastname: Lee
mesh_terms: D000970:Antineoplastic Agents / Q000138:chemical synthesis / Q000494:pharmacology*; D004354:Drug Screening Assays, Antitumor; D006801:Humans; D010946:Plants, Medicinal; D010947:Plants, Toxic; D011034:Podophyllotoxin / Q000031:analogs & derivatives* / Q000138:chemical synthesis / Q000302:isolation & purification / Q000494:pharmacology; D011035:Podophyllum / Q000032:analysis; D013329:Structure-Activity Relationship; D059005:Topoisomerase II Inhibitors
chemical_list: D000970:Antineoplastic Agents; D059005:Topoisomerase II Inhibitors; D011034:Podophyllotoxin