| 21. | Vivanco said no one previously knew about catechin's toxic effect on plants.
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| 22. | An example of such a molecule is catechin.
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| 23. | Making reference to no particular isomer, the molecule can just be called catechin.
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| 24. | The biosynthesis of catechin begins with a chalcone.
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| 25. | Plasma catechin metabolites are present as conjugated forms and mainly constituted by sulphated derivatives.
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| 26. | Procyanidin B6 is a catechin-( 4??! 6 )-catechin dimer.
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| 27. | Procyanidin B6 is a catechin-( 4??! 6 )-catechin dimer.
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| 28. | Procyanidin B8 is a catechin-( 4??! 6 )-epicatechin dimer.
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| 29. | An example of such molecules is catechin.
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| 30. | Taxifolin is then reduced by dihydroflavanol 4-reductase and leucoanthocyanidin reductase to yield catechin.
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