2,2-dimethyl-4-(1-methyl-1,6-dihydro-6-oxo-3-pyridazinyl-amino)-6-cyano-3chromanol 、
乙酸酐 反应 2.0h,
以Customary working-up gives 2,2-dimethyl-3-acetoxy-4-(1-methyl-1,6-dihydro-6-oxo-3-pyridazinyl-amino)-6-cyano-3-chromene, m.p. 110°-112°的产率得到2,2-Dimethyl-3-acetoxy-4-(1-methyl-1,6-dihydro-6-oxo-3-pyridazinyl-amino)-6-cyano-3-chromene