SRE-II, an amide derivative, is an activatable photosensitizer for photodynamic cancer research with decreased fluorescence and photosensitizing capabilities. SRE-II can be further converted into the active photosensitizer SDU Red via carboxylesterase-catalyzed amide bond cleavage. SRE-II induces DNA damage and cell apoptosis in the presence of light. SRE-II can act as a promising theranostic agent for triple-negative breast cancer[1].
