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(Alphar,betaS)-beta-Benzoylamino-alpha-hydroxybenzenepropanoic acid 5beta,6beta-(carbonylbisoxy)-3-(methoxymethoxy)-9,14,14-trimethyl-6,10-methano-12-oxa-5,6,7,8,11,13-hexahydro-12H-benzocycloundecene-8alpha-yl ester


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