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Mono-substituted hypocrellin B (MHB) and di-substituted hypocrellin B (DHB) by mercaptoacetic acid are new photosensitizers synthesized to improve the red absorption and water solubility of the parent hypocrellin B (HB). The photochemistries (Type I and/or Type II) of MHB and DHB have been studied in homogeneous solutions using electron paramagnetic(More)
15-Deacetyl-13-glycine substituted hypocrellin B (GDHB) is a new type of hypocrellin derivative with enhanced red absorption longer than 600 nm and water solubility. When an anaerobic DMSO or DMSO-buffer (pH 7.4) solution of GDHB was illuminated with >470 nm light, a strong electron spin resonance (ESR) signal was formed. The ESR signal was assigned to the(More)
To improve water solubility and specific affinity for malignant tumors, glycoconjugated hypocrellin B (GHB) has been synthesized. Illumination of deoxygenated DMSO solution containing GHB generates a strong electron paramagnetic resonance (EPR) signal. The EPR signal is assigned to the semiquinone anion radical of GHB (GHB*-) based on a series of(More)
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