@被譜合解折 例2 a specera (liquid filt 690 4000 3000 0001600 1200 800 VIce) 105 mass spectrua UV spectrum 1.075 mg/10 ml EtOH 0.1 cm cell M: 134 C9H 2040∞080120W00T80200202402602803002040200250 350 m/e