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Mass spectra of the dimethyl ester of the C11H16O4-diacid metabolite produced during anaerobic degradation of nonlabeled naphthalene (A), per-deuterated naphthalene-d8 (B), and per-deuterated naphthalene-d8 in a [13C]bicarbonate-buffered medium (C). For chemical structure, see Fig. 5 (compound VII). MW, molecular weight.
