. . . . . . . . . . "experimental"@en . . . "N-(Allyloxycarbonyl)-4-[N-(Carboxy-Formyl)-2-(Benzoic Acid)-Amino]-L-Phenylalaninyl-Amino-Butyloxy-(6-Hydroxy-Benzoic Acid Methyl Ester)"@en . . . . . . . . . "Compound 6"@en . . . . . . . . . . "Rolf Schimpf, Walter Horstmann, \"Process for the preparation of 2-aminobenzene-1,4-disulphonic acids and the new compound 6-chloro-2-aminobenzene-1,4-disulphonic acid.\" U.S. Patent US5315036, issued May, 1929."@en . . . . .