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silicon phthalocyanine 4 A synthetic photosensitizer agent containing a large macrocyclic ring chelated with silicon. Silicon phthalocyanine 4 localizes primarily in mitochondrial cytosolic membranes and, after photoexcitation, forms reactive oxygen species that induce apoptosis. Check for active clinical trials or closed clinical trials using this agent. (NCI Thesaurus)
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Synonym: | ![](https://webarchive.library.unt.edu/eot2008/20081025043322im_/http://www.cancer.gov/images/spacer.gif) | Pc-4 (Silicone phthalocyanine) | | ![](https://webarchive.library.unt.edu/eot2008/20081025043322im_/http://www.cancer.gov/images/spacer.gif) | Abbreviation: | ![](https://webarchive.library.unt.edu/eot2008/20081025043322im_/http://www.cancer.gov/images/spacer.gif) | Pc 4 | | ![](https://webarchive.library.unt.edu/eot2008/20081025043322im_/http://www.cancer.gov/images/spacer.gif) |
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