4H,5H,6H,7H-[1,3]Thiazolo[5,4-c]pyridine-2-carboxylic Acid Hydrochloride may be useful in the preparation of sulfonamides as bradykinin B1 receptor antagonists. It is a salt analog of 4,5,6,7-Tetrahydro-thiazolo[5,4-c]pyridine-2-carboxylic Acid , which is related to Edoxaban , a direct factor Xa inhibitor and anticoagulant.