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Dark and photoinduced (2-h and 4-h daily exposure to visible light) cytotoxicity of diethyl (CKOEt) and dimethyl (CKOMe) carbaporphyrin ketals on the promonocytic human cell line U937. Amphotericin B (Amph B) and meglumine antimoniate (Glucantime) are included for comparison. *, P < 0.05 (Tukey test).
