5-hydroxy-6,5'(S)-cyclouridine 在
sodium hydroxide 、
乙酸酐 作用下,
反应 1.0h,
以48%的产率得到(1R,2S,3S,4R,5S,6S,12R,19R,20R,21S,22R)-4,5,11,11,20,21-hexahydroxy-13,24,25-trioxa-7,9,16,18-tetrazaheptacyclo[12.8.1.13,6.119,22.02,12.07,12.018,23]pentacos-14(23)-ene-8,10,15,17-tetrone