6-羟基-2-(丙基硫代)-4(3h)-嘧啶酮

7,11-diphenyl-3-sulfanylidene-2,4-diazaspiro[5.5]undecane-1,5,9-trione

丙二酸

5-[[4-[(4,6-dioxo-2-sulfanylidene-1,3-diazinan-5-ylidene)methyl]phenyl]methylidene]-2-sulfanylidene-1,3-diazinane-4,6-dione

4,6-二羟基-2-甲硫基嘧啶