Online H/D exchange liquid chromatography as a support for the mass spectrometric identification of the oxidation products of melatonin
作者:Fabrice Collin、Dominique Bonnefont-Rousselot、Saï Yous、Catherine Marchetti、Daniel Jore、Monique Gardès-Albert
DOI:10.1002/jms.1508
日期:2009.3
behaviour was observed for the oxidation products, obtained from the opening of the indole ring by oxidative attack. Fragmentation pathways are proposed and H/D scrambling has been employed as a fingerprint, allowing identification of N(1)-acetyl-5-methoxykynurenin (AMK), N(1)-acetyl-N(2)-formyl-5-methoxykynurenin (AFMK), dehydro-AFMK and hydroxymelatonin as the oxidation products of melatonin in vitro
质子褪黑激素的氢-氘交换及其体外氧化终产物已通过液相色谱和离子阱质谱联用进行了研究。对于褪黑激素及其氧化产物,在气相裂解过程中均观察到了吲哚环C2和C4位置质子的特定H / D加扰。碰撞诱导的解离谱显示可变氘的NH(3),H(2)O和CH(3)CONH(2)的损失。另外,对于氧化产物观察到类似的H / D加扰行为,所述氧化产物是通过氧化攻击从吲哚环的打开而获得的。提出了碎裂途径,并采用了H / D加扰作为指纹图谱,从而可以鉴定N(1)-乙酰基-5-甲氧基肾上腺素(AMK),N(1)-乙酰基-N(2)-甲酰基-5-甲氧基肾上腺素(AFMK),