137005-17-5 4-N-(3-Methoxypropyl)-N-pentylcarbamoyl-5-(2-naphthylsulfonyl)pentanoic acid Ksg 504 Ksg-504 L-Arginine, mono((R)-5-((3-methoxypropyl)pentylamino)-4-((2-naphthalenylsulfonyl)methyl)-5-oxopentanoate)