Dingjan, H. A. published the artcileThe Guerbet reaction applied to diodone, Recommanded Product: 2-(3,5-Diiodo-4-oxopyridin-1(4H)-yl)acetic acid, the publication is Mikrochimica Acta (1978), 2(5-6), 395-402, database is CAplus.
In the 1st step of the Guerbet test, applied to diodone acid (I), the nitration products II and III are formed. In the 2nd (reduction) step with Zn-HCl, products IV and V are formed.
Mikrochimica Acta published new progress about 101-29-1. 101-29-1 belongs to iodides-buliding-blocks, auxiliary class Pyridine,Iodide,Carboxylic acid,Ketone, name is 2-(3,5-Diiodo-4-oxopyridin-1(4H)-yl)acetic acid, and the molecular formula is C7H5I2NO3, Recommanded Product: 2-(3,5-Diiodo-4-oxopyridin-1(4H)-yl)acetic acid.
Referemce:
https://en.wikipedia.org/wiki/Iodide,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com