From the amidophenylpropiolic acid to kynuren acid and their relatives.

[1] BEILSTEIN, HANDWORTERBUCH, V4, P364

[2] Concerning the effect of acetone dicarbonic acid ester on aniline. [J]. BERICHTE DER DEUTSCHEN CHEMISCHEN GESELLSCHAFT, 1900, 33 : 3439 - 3447

[3] BISCHLER A, 1893, BER, V26, P1352

[4] CAMPS R, 1899, BER DTSCH CHEM GES, V32, P3232

[5] CAMPS R, ARCH PHARM, V239

[6] Camps R., 1899, BER DTSCH CHEM GES, V32, P3228, DOI 10.1002/cber.18990320389

[7] CAMPS R, ARCH PHARM, V234, P672

[8] CAMPS R, ARCH PHARM, V237, P659

[9] CONRAD, 1886, BER DTSCH CHEM GES, V21, P1975

[10] CONRAD, 1888, BER DTSCH CHEM GES, V21, P1975

[1] BEILSTEIN, HANDWORTERBUCH, V4, P364

[2] Concerning the effect of acetone dicarbonic acid ester on aniline. [J]. BERICHTE DER DEUTSCHEN CHEMISCHEN GESELLSCHAFT, 1900, 33 : 3439 - 3447

[3] BISCHLER A, 1893, BER, V26, P1352

[4] CAMPS R, 1899, BER DTSCH CHEM GES, V32, P3232

[5] CAMPS R, ARCH PHARM, V239

[6] Camps R., 1899, BER DTSCH CHEM GES, V32, P3228, DOI 10.1002/cber.18990320389

[7] CAMPS R, ARCH PHARM, V234, P672

[8] CAMPS R, ARCH PHARM, V237, P659

[9] CONRAD, 1886, BER DTSCH CHEM GES, V21, P1975

[10] CONRAD, 1888, BER DTSCH CHEM GES, V21, P1975