RT Journal Article SR Electronic T1 Relationship between Electronic Structure and Cytotoxic Activity of Azulenes JF In Vivo JO In Vivo FD International Institute of Anticancer Research SP 385 OP 389 VO 20 IS 3 A1 KURIHARA, TERUO A1 NOGUCHI, MAYUMI A1 NOGUCHI, TAKASHI A1 WAKABAYASHI, HIDETSUGU A1 MOTOHASHI, NOBORU A1 SAKAGAMI, HIROSHI YR 2006 UL http://iv.iiarjournals.org/content/20/3/385.abstract AB The structure-activity relationship of the cytotoxic activity of azulene and azulene derivatives was discussed, using theoretically calculated results. In order to clearly divide the azulenes into three groups according to their functional groups, the CC50, four different dipole moments (μG, μESP-G, μW and μESP-W) and heats of formation (ΔHf) of the azulenes [1-24] were separately calculated in two states, gas-phase and water, by the conductor-like screening model/parametric method 3 (COSMO/PM3). For the halogenated azulenes and isopropyl azulenes, the cytotoxic activity might follow the three quantitative structure-activity relationship (QSAR) parameters: ΔΔHf, HOMO energy and μw. Whereas, for the other ten compounds [3-5, 7-8, 10, 15-18], the cytotoxic activity might be related to the three QSAR parameters, ΔΔHf, LUMO energy and μG. Copyright © 2006 International Institute of Anticancer Research (Dr. John G. Delinassios), All rights reserved