Additional file 4.

COSY analysis in a sample from 2007 corresponding to EL 35 (véraison). Spectrum is shown in the range of δ 6.0 to δ 8.0 ppm which is enriched in phenolic compounds.

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Fortes et al. BMC Plant Biology 2011 11:149   doi:10.1186/1471-2229-11-149