| http://www.w3.org/ns/prov#value | - The present invention provides a cephalosporin compound represented by formulas (I-S) and (I-R), wherein R1 is a C1-4 alkyl, C3-4 alkenyl, C3-4 cycloalkyl, amino optionally substituted with a C1-4 alkyl radical, phenyl, or 2-, 4- or 6- s...
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