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1273550-33-6tert-butyl N-[1-(4-fluorophenyl)-2-hydroxyethyl]carbamate CAS No. 1273550-33-6 Chemical Formula : STD No. AN667136
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红霉素杂质28 (N-亚硝基去甲基红霉素) (N-亚硝基红霉素EP杂质B)
Erythromycin Impurity 28 (N-Nitroso N-Desmethyl Erythromycin) (N-Nitroso Erythromycin EP Impurity B) CAS No. N/A Chemical Formula : C36H64N2O14 STD No. RM67328E
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