A Part of the Pathway of UMP Biosynthesis Is Shown $\rightarrow$

Essay

A part of the pathway of UMP biosynthesis is shown below. What intermediate is missing? What is the enzyme that generates this compound in the pathway? What is the enzyme that uses this compound as a substrate in the pathway?
Carbamoyl phosphate + Aspartate $\rightarrow$ Carbamoyl aspartate $\rightarrow$ __________ $\rightarrow$ Orotate