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(A) Identification of a hexachlorotrihydroxydiphenyl ether as an metabolic intermediate produced from 1,2,3,4,7,8-hexachlorodibenzo-p-dioxin by S. wittichii RW1 by ESI-MS/MS; (B) identification of a trichlorotrihydroxydiphenyl ether as an metabolic intermediate produced from 1,2,3-trichlorodibenzo-p-dioxin by S. wittichii RW1 by ESI-MS/MS.
