2-氨基-噻唑并[4,5-d]嘧啶-5,7(4h,6h)-二酮

pyrimidine-2,4,5,6(1H,3H)-tetraone

5,5-二羟基六氢嘧啶-2,4,6-三酮

核黄素

5-丁基-1h,3h,5h-嘧啶-2,4,6-三酮