127980-50-1Relevant articles and documents
Cephalosporin compounds
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, (2008/06/13)
Cephalosporin antibiotics having a 3-position substituent of the formula: STR1 are described, wherein R1 is hydrogen or certain optionally substituted alkyl groups; X is a benzene ring or certain 5 or 6-membered heterocyclic ring and is fused to ring Y which is a nitrogen containing heteroaryl group; R2 and R3 are independently hydroxy or an in vivo hydrolysable ester thereof, and ring system X-Y is optionally substituted. Processes for their preparation and use are described.