All of the resonance lines were fully assigned and the effects of substituents and heteroatoms in ring on chemical shifts were discussed.
对所有共振谱线进行了全面归属，并讨论了不同取代基和环内不同杂原子对化学位移值的影响。
2
The result shows excellent selectivity of to the 1, 3 - substitution positions, and the alkyl chain may be saturated or unsaturated and may contain one or more heteroatoms.