Reaction of 2-thiouracils with formaldehyde under acidic conditions.
D000143:Acids; D055598:Chemical Phenomena; D002621:Chemistry; D005557:Formaldehyde; D006571:Heterocyclic Compounds / Q000138:chemical synthesis; D006863:Hydrogen-Ion Concentration; D011743:Pyrimidines / Q000138:chemical synthesis; D013889:Thiouracil
D000143:Acids; D006571:Heterocyclic Compounds; D011743:Pyrimidines; D005557:Formaldehyde; D013889:Thiouracil