The first nitrone-containing pentacyclic triterpenoid derivatives were synthesized from betulone and dihydrobetulone aldehydes and 3β-hydroxyaminolup-20(29)-en-28-al oxime. The Z-configuration of the nitrone double bond was established using NMR spectroscopic methods.
第一个含硝酮的五环三萜衍
生物是由白桦酮和二氢白桦酮醛以及3β-羟基
氨基-20(29)-烯-28-醇
肟合成的。通过核磁共振光谱法确定了硝酮双键的Z构型。