Article 2 antibacterial activity 2 antiinfective agent electrospray mass spectrometry 2 infrared spectroscopy 2 proton nuclear magnetic resonance 2 unclassified drug 2 1H-NMR 1 2 furyl [4 [4 (1 piperidinylsulfonyl)benzyl] 1 piperazinyl]methanone 1 2 furyl [4 [4 (4 morpholinylsulfonyl)benzyl] 1 piperazinyl]methanone 1 2 furyl [4 [4 [(2 methyl 1 piperidinyl)sulfonyl]benzyl] 1 piperazinyl]methanone 1 2 furyl [4 [4 [(2,6 dimethyl 1 piperidinyl)sulfonyl]benzyl] 1 piperazinyl] 2 methanone 1 2 furyl [4 [4 [(3 methyl 1 piperidinyl)sulfonyl]benzyl] 1 piperazinyl]methanone 1 2 furyl [4 [4 [(3,5 dimethyl 1 piperidinyl)sulfonyl]benzyl] 1 piperazinyl]methanone 1 2 furyl [4 [4 [(4 methyl 1 piperidinyl)sulfonyl]benzyl] 1 piperazinyl]methanone 1 3 [4 (2 furoyl) 1 piperazinyl] n (2 ethoxyphenyl) propanamide 1 3 [4 (2 furoyl) 1 piperazinyl] n (2 ethylphenyl) propanamide 1 3 [4 (2 furoyl) 1 piperazinyl] n (2 methoxycarbonylphenyl) propanamide 1 3 [4 (2 furoyl) 1 piperazinyl] n (2 methylphenyl) propanamide 1 3 [4 (2 furoyl) 1 piperazinyl] n (2 phenylethyl) propanamide 1 3 [4 (2 furoyl) 1 piperazinyl] n (2,4 dimethylphenyl) propanamide 1 3 [4 (2 furoyl) 1 piperazinyl] n (2,5 dimethylphenyl) propanamide 1 3 [4 (2 furoyl) 1 piperazinyl] n (2,6 dimethylphenyl)propanamide 1 3 [4 (2 furoyl) 1 piperazinyl] n (3 methylphenyl) propanamide 1 3 [4 (2 furoyl) 1 piperazinyl] n (4 ethoxyphenyl) propanamide 1 3 [4 (2 furoyl) 1 piperazinyl] n (4 ethylphenyl) propanamide 1 3 [4 (2 furoyl) 1 piperazinyl] n propanamide 1 3 [4 (2 furoyl) 1 piperazinyl] nbenzylpropanamide 1 3 [4 (2 furoyl) 1 piperazinyl] ncyclohexylpropanamide 1 3 [4 (2 furoyl) 1 piperazinyl] nphenylpropanamide 1