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UV spectra of metabolites from organic phase of media in A549 cells at 24h. (A): M1, GSH-B[a]P-7,8-dione; (B): M2, O-mono-sulfate-catechol; (C): M3, O-mono-glucuronide-catechol; (D): M4, NAC-B[a]P-7,8-dione; (E): M5, unknown metabolite with m/z 444; (F): M6, adenine-B[a]P-7,8-dione adduct; (G): M7, Mono-hydroxylated-B[a]P-7,8-dione; (H): M8, O8-mono-methylated-catechol.
