TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTWTTTTTTTTTTTTTTTMTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT 图4.5.3乙苯质子去耦"CNR图谱 囝4.5.4乙苯的偏共振去耦"CNR图谱 420p 囝4.5.52-丁酮偏共振去耦"CNR图谱图 4.5.3 乙苯质子去耦 13C NMR 图谱 图 4.5.4 乙苯的偏共振去耦 13C NMR 图谱 图 4.5.5 2-丁酮偏共振去耦 13C NMR 图谱