(S)-N-(N-(4-amino-5-(5,6-dihydro-4H-cyclopenta[d]thiazol-2-yl)-5-oxopentyl)carbamimidoyl)-2,2,5,7,8-pentamethylchromane-6-sulfonamide 在
(benzotriazo-1-yloxy)tris(dimethylamino)phosphonium hexafluorophosphate 、
N,N-二异丙基乙胺 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
生成 (6S,8aS)-4-Oxo-2-(3-phenyl-propionyl)-octahydro-pyrrolo[1,2-a]pyrazine-6-carboxylic acid [(S)-1-(5,6-dihydro-4H-cyclopentathiazole-2-carbonyl)-4-guanidino-butyl]-amide; compound with trifluoro-acetic acid