英文名称
1-[(4R,6R,6aS)-6-ethyl-2,2-dimethyl-3a,4,6,6a-tetrahydrofuro[3,4-d][1,3]dioxol-4-yl]pyrimidine-2,4-dione;ethyl 3-[(4R,6R,6aS)-6-ethyl-2,2-dimethyl-3a,4,6,6a-tetrahydrofuro[3,4-d][1,3]dioxol-4-yl]-2,6-dioxopyrimidine-4-carboxylate;ethyl 3-[(2R,4R,5R)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]-2,6-dioxopyrimidine-4-carboxylate