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A new radical scavenger, named phenopyrrozin, was isolated from the culture broth of Penicillium sp. FO-2047. Phenopyrrozin was purified from whole broth solvent extraction, silica gel chromatography, and HPLC. The structure of phenopyrrozin was elucidated as 5,6,7,7a-tetrahydro-2-hydroxy-1-phenyl-3H-pyrrolizin-3-one. The IC50 of phenopyrrozin against lipid peroxidation induced by Cr2K2O7 was 73 micrograms/ml. Phenopyrrozin also reduced chromosomal aberrations induced by paraquat.
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Shiomi et al. (1995) studied this question.
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