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. 2017 Apr 27;7:46481. doi: 10.1038/srep46481

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ATR-FTIR spectra of (a) polymerised isoeugenol from IE1, (b) untreated archaeological wood and (c) the centre from the treated wood piece of IE1. The emergence of a band at 1732 cm⁻¹ can be seen in c showing the presence of isoeugenol oligomers as it is also seen in spectra a but not in b.