quinone
One potential mechanism of tamoxifen carcinogenesis could involve       metabolism of tamoxifen to 3,4-dihydroxytamoxifen followed by oxidation to a       highly reactive o-quinone which has the potential to alkylate and/or oxidize       cellular macromolecules in vivo.
One potential mechanism of tamoxifen carcinogenesis could involve       metabolism of tamoxifen to 3,4-dihydroxytamoxifen followed by oxidation to a       highly reactive o- @SUBJECT$  which has the potential to alkylate and/or  @PREDICAT$        cellular  @OBJECT$  in vivo.