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7-Aminodeacetoxycephalosporanic acid22252-43-330 % similar 7-Amino-3-methyl-8-oxo-5-thia-1-azabicyclo(4.2.0)oct-2-ene-2-carboxylic acid26395-99-330 % similar Cefpiramide70797-11-430 % similar Gclh64308-63-030 % similar