chemical reagent

 

pyrongllic acid -----C6H3(OH)3

Propyi gallate ----- C6H2(OH)3COOC3H7

3.4.5-trimethoxybenzoic acid methyl oster ----- C6H2(OCH3)3COOCH3

3.4.5-trimethoxybenzoic acid ----- C6H2(OCH3)3COOH

Gallic acid ----- C6H2(OH)3COOH.H2O

tri-ethylene glycol

 

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