Abstract
Purpurins and benzochlorins are hydrophobic second generation photosensitizers, which have sizable absorption in the 650–780 nm range and exhibit photodynamic activity against tumors after visible light treatment. This review summarizes the published data regarding these compounds: from the spectroscopic, photophysical and photochemical characteristics to the in vivo and in vitro photodynamic inactivation of tumors and normal tissue effects. Some mechanistic studies using both the Sn-etiopurpurin and/or the Cu-benzochlorin derivatives are also reviewed.
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