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4-HO-6,7-DIMETHOXY-1-(3-MEO-PH)-NAPHTHALENE-2-CARBOXYLIC ACID TERT-BUTYL ESTER 4-HO-6,7-DIMETHOXY-1-(3-MEO-PH)-NAPHTHALENE-2-CARBOXYLIC ACID TERT-BUTYL ESTER