4-((((4-Chlorobenzoyl)(4-methoxyphenyl)amino)acetyl)(4-methoxyphenyl)amino)butanoic acid 71455-75-9 Butanoic acid, 4-((((4-chlorobenzoyl)(4-methoxypheeyl)amino)acetyl)(4-methoxyphenyl)amino)- N-(N-(p-Chlorobenzoyl)-2-(p-anisidino)acetyl)-4-(p-anisidino)butyric acid