Armarego, Wilfred L. F. published the artcilePterins. Part 2. Stereochemistry of catalytic reduction of 6-methyl- and 6,7-dimethyl-pterin and of 2,4-diamino-6-methylpteridine, Computed Properties of 5098-14-6, the publication is Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999) (1977), 2529-36, database is CAplus.
Catalytic addition of 2 mols. of H to 7-deuterio-6-trideuteriomethylpterin gave a 0.8:1 mixture of cis– and trans-7-deuterio-6-trideuteriomethyl-5,6,7,8-tetrahydropterin. Similar reduction of 2,4-diamino-7-deuterio-6-(partial)trideuteriomethylpteridine gave a 1:1 mixture of cis– and trans-2,4-diamino-7-deuterio-6-(partial)trideuteriomethyl-5,6,7,8-tetrahydropteridine. However, catalytic reduction of 6,7-dimethyl- and 6,7-bis(trideuteriomethyl)pterin is stereospecific and gave only the cis 5,6,7,8-tetrahydro derivatives Reduction of 6,7-dimethylpterin with Na in EtOH gave a 1:1 mixture of cis– and trans-6,7-dimethyl-5,6,7,8-tetrahydropterin. The stereochem. of the products was deduced from 1H NMR spectroscopy.
Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999) published new progress about 5098-14-6. 5098-14-6 belongs to nitriles-buliding-blocks, auxiliary class Nitrile,Salt,Sulfonic acid,Amine,Benzene, name is 2-Aminomalononitrile 4-methylbenzenesulfonate, and the molecular formula is C10H11N3O3S, Computed Properties of 5098-14-6.
Referemce:
https://en.wikipedia.org/wiki/Nitrile,
Nitriles – Chemistry LibreTexts