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6-O-[3-(3-quinoyl)-2propen-1-yl]-9-keto-2',4''-benozoate-11,12-cyclic carbamate erythromycin A

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6-O-[3-(3-quinoyl)-2propen-1-yl]-9-keto-2',4''-benozoate-11,12-cyclic carbamate erythromycin A