Colline A, Bolard J, Chinsky L, Fang J R, Rinehart K L
J Antibiot (Tokyo). 1985 Feb;38(2):181-5. doi: 10.7164/antibiotics.38.181.
The Raman spectra of the polyene antibiotic nystatin have been investigated between 1500 and 1650 cm-1. Only one band is observed in the resonance Raman spectra obtained with a 3045 A excitation radiation. Two major bands are observed in the preresonance spectra of pure nystatin obtained with a 4545 A excitation. A supplementary band at 1557 cm-1 observed in the preresonance spectra of samples of commercial origin is ascribed to the presence of heptaene impurities, the Raman spectra of which are preferentially enhanced by resonance, owing to the closer proximity of their absorption to the excitation radiation.
已对多烯抗生素制霉菌素在1500至1650厘米⁻¹之间的拉曼光谱进行了研究。在用3045埃激发辐射获得的共振拉曼光谱中仅观察到一条谱带。在用4545埃激发获得的纯制霉菌素的预共振光谱中观察到两条主要谱带。在商业来源样品的预共振光谱中观察到的位于1557厘米⁻¹处的一条补充谱带归因于庚烯杂质的存在，其拉曼光谱由于其吸收与激发辐射更接近而优先通过共振增强。
