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Etude de nouvelles stratégies de valorisation de mono et ...

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tanins hydrolysables, ou gallotanins (figure 3) <strong>et</strong> les tanins con<strong>de</strong>nsés, ou tanins<br />

catéchiques (figure 4). 1<br />

HO<br />

HO<br />

HO<br />

C<br />

OH O<br />

HO<br />

HO<br />

OH<br />

O<br />

HO<br />

O<br />

HO<br />

OH<br />

O O<br />

C C<br />

OH<br />

HO<br />

O<br />

OH<br />

O<br />

O<br />

HO<br />

O<br />

O<br />

C<br />

C<br />

O<br />

O<br />

OH<br />

O<br />

OH<br />

O<br />

C<br />

OH<br />

Figure 3 : Exemple <strong>de</strong> gallotanin.<br />

OH<br />

OH<br />

OH<br />

OH<br />

OH<br />

HO<br />

OH<br />

HO<br />

OH<br />

OH<br />

O<br />

OH<br />

O<br />

OH<br />

OH<br />

OH<br />

OH<br />

Figure 4 : Exemple <strong>de</strong> tanin catéchique.<br />

OH<br />

O<br />

C<br />

n<br />

O<br />

OH<br />

OH<br />

OH<br />

HO<br />

OH<br />

OH<br />

OH<br />

17

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