5-Aminoorotic acid (CAS NO.7164-43-4) is also named as 4-Pyrimidinecarboxylic acid, 5-amino-1,2,3,6-tetrahydro-2,6- dioxo- ; NSC 43249 ; Orothic acid, 5-amino- ; 5-Amino-2,6-dioxo-1,2,3,4-tetrahydropyrimidine-4-carboxylic acid .