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semustine A methylated derivative of carmustine with antineoplastic activity. As an alkylating agent, semustine forms covalent linkages with nucleophilic centers in DNA, causing depurination, base-pair miscoding, strand scission, and DNA-DNA cross-linking, which may result in cytotoxicity. Check for active clinical trials or closed clinical trials using this agent. (NCI Thesaurus)
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Synonyms: | ![](https://webarchive.library.unt.edu/eot2008/20081006053816im_/http://www.nci.nih.gov/images/spacer.gif) | CCNU, methyl- MCCNU methyl CCNU methyl-CCNU | | ![](https://webarchive.library.unt.edu/eot2008/20081006053816im_/http://www.nci.nih.gov/images/spacer.gif) | Abbreviation: | ![](https://webarchive.library.unt.edu/eot2008/20081006053816im_/http://www.nci.nih.gov/images/spacer.gif) | MeCCNU | | ![](https://webarchive.library.unt.edu/eot2008/20081006053816im_/http://www.nci.nih.gov/images/spacer.gif) |
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