Which of the following is not involved in synthesis of pyrimidines?

The pyrimidine synthesis is a similar process than that of Purines(Purines Synthesis). In the de novo synthesis of Pyrimidines, the ring issynthesized first and then it is attached to a ribose-phosphate to for a pyrimidinenucleotide. Pyrimidine rings are assembled from bicarbonate, aspaate, and Ammoni