Hematoporphyrin derivative and method of preparation and purification
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United States of America Patent
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Aug 29, 1989
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N/A
app pub date -
Nov 26, 1986
filing date -
Nov 26, 1986
priority date (Note) -
Expired
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Abstract
A substance effective for treatment of tumors having a fluorescent emission between 640 nm and 650 nm capable of preferentially localizing in and being retained in tumor cells, the substance being a product of esterification of hematorporphyrin with a chlorin and a process for destruction of tumor cells in a patient involving the steps of: (a) injecting a solution containing the substance into a patient; (b) allowing the substance to accumulate in the tumor cells; and (c) irradiating the tumor site with light at a predetermined intensity and a wavelength between about 640 nm and about 650 nm.
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