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ANHYDROERYTHROMYCIN A (25 mg) ((1S,2R,3R,4S,5R,8R,9S,10S,11R,12R,14R)-9-[(2,6-Dideoxy-3-C-methyl-3-O-methyl-α-L-ribo-hexopyranosyl)oxy]-5-ethyl-3- hydroxy-2,4,8,10,12,14-hexamethyl-11-{[3,4,6-trideoxy-3-(dimethylamino)-β-D-xylo-hexopyranosyl]oxy}-6,15,16- trioxatricyclo[10.2.1.1¹,⁴]hexadecan-7-one)