N-(N-cyclohept-4-enyl-N-methyl-O-t-butyl-(S)-α-aspartyl)-2(S)-{2-[N-(N,N'-di-t-butoxycarbonylamidino)-4-piperidyloxy]ethyl}piperidine

N-(N-cyclohept-4-enyl-O-t-butyl-(S)-α-aspartyl)-2(S)-{2-[N-(N,N'-di-t-butoxycarbonylamidino)-4-piperidyloxy]ethyl}piperidine

N-(N-cyclohexyl-O-t-butyl-(S)-α-aspartyl)-2(S)-{2-[N-(N,N'-di-t-butoxycarbonylamidino)-4-piperidyloxy]ethyl}piperidine

N-(N-cycloheptyl-O-t-butyl-(S)-α-aspartyl)-2(S)-{2-[N-(N,N'-di-t-butoxycarbonylamidino)-4-piperidyloxy]ethyl}piperidine