[(2R,5S)-5-(2,4-dioxopyrimidin-1-yl)-4-[(4R,6S)-4-(2,4-dioxopyrimidin-1-yl)-6-[(4-methylbenzoyl)oxymethyl]-4,6-dihydrofuro[3,4-d]triazol-2-yl]-2,5-dihydrofuran-2-yl]methyl 4-methylbenzoate 在
ammonium hydroxide 作用下,
以81%的产率得到1-[(2S,5R)-3-[(4R,6S)-4-(2,4-dioxopyrimidin-1-yl)-6-(hydroxymethyl)-4,6-dihydrofuro[3,4-d]triazol-2-yl]-5-(hydroxymethyl)-2,5-dihydrofuran-2-yl]pyrimidine-2,4-dione