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| | Broad Spectrum antibiotics - Patent 4025504 |
 | | 3,142,673), a broad spectrum antibiotic, is reported to have greater efficacy against gram-negative bacteria via the parenteral route of administration, but has limited utility via oral administration. |
 | | As has been previously mentioned, the penicillins of the present invention are broad spectrum antibiotics which are, unlike many penicillin analogs, highly antagonistic toward gram-negative microorganisms, in particular E. coli, Pseudomones and Klebsiella. |
 | | Infrared spectrum peaks (microns; KBr): 3.0(b), 3.4, 5.62, 6.0, 6.2, 6.6, 6.95, 7.15, 7.55, 7.75, 8.0, 8.3 and 8.8. |
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