2''-O,4'-O-Bis(trimethylsilyl)-6-O-methyl-12-deoxyerythromycin
2''-O,4'-O-Bis(trimethylsilyl)-6-O-methyl-12-deoxyerythromycin ??
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2''-O,4'-O-Bis(trimethylsilyl)-6-O-methyl-12-deoxyerythromycin ?? ??
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