2-(2-氨基-4-氧代-1,3-噻唑-5-基)乙酸

(5-methoxy-2,4,6-trioxo-1,3-diazinan-5-yl)urea

1,3,7-三甲基尿酸

1,5-dimethyl-2,4,6,8-tetraaza-bicyclo[3.3.1]nonane-3,7-dione

1,3,7-trimethylcaffolide