[[2-(Amino-3,4-dioxo-1-cyclobuten-1-yl)amino]alkyl]-acid...

[[4 -[4-(4-phenyl-1-piperazinyl)phenoxymethyl]-1,3-dioxolan-2-yl

[[4-[4-(4-phenyl-1-piperazinyl)phenoxymethyl]- 1,3-dioxolan-2-yl

[[4-[4-(4-phenyl-1-piperazinyl)phenoxymethyl]-1,3-diox olan-2-yl

[[Bis(aryl)methylene]-1-piperidinyl]alkyl-pyrimidinones

[[Bis(aryl)methylene]-1-piperidinyl]alkyl-pyrimidinones

[[Bis(aryl)methylene]-1-piperidinyl]alkyl-pyrimidinones useful f

[[[(2,4-Dioxo-1-imidazolidinyl)amino]-carbonyl]amino]acetylpenic

[[[(2,4-Dioxo-1-imidazolidinyl)amino]carbonyl]amino]-acetylcepha

[[[(2,4-Dioxo-1-imidazolidinyl)amino]carbonyl]amino]-acetylcepha

[[[(3-pyridinyl)methylen]amino]oxy]alkanoic acids and esters

[[[Imidazolidinyl amino]carbonyl]amino]acetyl cephalosporin deri