Kynurenin vs kynurenine duplicates?

Our research is not finding these bioactive indoleamines are separate and unique compounds. The tryptophan metabolic pathway seems to include kynurenin(e) and kynurenate. We cannot find them alluded to simultaneously in one article or location. Could you please doublecheck?

53470-1 Kynurenin:SCnc:Pt:Ser/Plas:Qn:

53734-0 Kynurenine:SCnc:Pt:Ser/Plas:Qn:

From Metametrix Clinical Institute, which outlines the kynurenin pathway for tryptophan in one .pdf and the kynurenine pathway for tryptophan in a .ppt: ... neShow.ppt - 2005-06-16

We included texts under Google Scholar which lists only the kynurenine pathway for tryptophan:
Bioactive Natural Products (Part G): Bioactive Natural Products
By Atta-ur- Rahman
Edition: illustrated
Published by Elsevier, 2002
ISBN 0444510044, 9780444510044
1364 pages

The Interdisciplinary Conference on Tryptophan and Related Substances: Proceedings of the Eleventh Triennial Meeting of International Study Group for Tryptophan Research (ISTRY-2006) Sanjyo-Kaikan Conference Hall, The Uni
By Katsuji Takai, International Study Group for Tryptophan Research, Meeting Staff, Meeting
Contributor International Study Group for Tryptophan Research, Meeting Staff
Edition: illustrated
Published by Elsevier Science Health Science div, 2008
Original from the University of Michigan
Digitized Jul 29, 2008
ISBN 0444528962, 9780444528964
452 pages

Thanks for your consideration

Thanks for letting us know about this. You are correct, they are the same thing. We will deprecate 53734-0 and add Kynurenine as a synonym for 53470-1 .