(E)-6-[3-[(N-cyano-N'-(2-methylpropyl)carbamimidoyl)amino]phenyl]-6-pyridin-3-ylhex-5-enoic acid
(E)-6-[3-[(N-cyano-N'-isobutyl-carbamimidoyl)amino]phenyl]-6-(3-pyridyl)hex-5-enoic acid
(E)-6-[3-[[(cyanoamino)-isobutyliminomethyl]amino]phenyl]-6-(3-pyridyl)hex-5-enoic acid
(E)-6-[3-[(N-cyano-N'-(2-methylpropyl)carbamimidoyl)amino]phenyl]-6-pyridin-3-yl-hex-5-enoic acid