N-[(2S)-1-Amino-1-oxo-3-phenyl-2-propanyl]-2′-(1,3-benzodioxol-5-ylmethyl)-1′,3′-dioxo-2′,3′-dihydro-1′H,8′H-spiro[piperidine-4,5′-[1,2,4]triazolo[1,2-a]pyridazine]-8′-carboxamide

N-[(2S)-1-Amino-1-oxo-3-phenyl-2-propanyl]-2′-(1,3-benzodioxol-5-ylmethyl)-1′,3′-dioxo-2′,3′-dihydro-1′H,8′H-spiro[piperidine-4,5′-[1,2,4]triazolo[1,2-a]pyridazine]-8′-carboxamide

Spiro[piperidine-4,5′(8′H)-[1H][1,2,4]triazolo[1,2-a]pyridazine]-8′-carboxamide, N-[(1S)-2-amino-2-oxo-1-(phenylmethyl)ethyl]-2′-(1,3-benzodioxol-5-ylmethyl)-2′,3′-dihydro-1′,3′-dioxo-

8′N-[1-carbamoyl-2-phenyl-(1S)-ethyl]-2′-benzo[d][1,3]dioxol-5-ylmethyl-1′,3′-dioxospiro[hexahydropyridine-4,5′-(2′,3′,5′,8′-tetrahydro-1′H-[1,2,4]triazolo[1,2-a]pyridazine)]-8′-carboxamide