(2008/06/13)
N-[[1-(Phenylmethyl)cyclopentyl]carbonyl]-4-[(4-quinolinylcarbonyl)amino)-L-phenylalanine
4-[[(2-nitrophenyl)carbonyl]amino]-N-[[1-(phenylmethyl)cyclopentyl]carbonyl]-L-phenylalanine
4-[[(2-methyl-5-nitrophenyl)carbonyl]amino]-N-[[1-(phenylmethyl)cyclopentyl]carbonyl]-L-phenylalanine