.ESI离子源背景离子来源m/zIon Compound Source of Unknown33(M+H)+ methanol42(M+H)+ acetonitrile59(M+NH4)+ acetonitrile64(M+Na)+ acetonitrile65(2M+H)+ methanol74(M+H)+ dimethyl formamide79(M+H)+ DMSO83(2M+H)+ Acetonitrile85(M+H)+ d6DMSO88(M+Formic Acid+H)+ acetonitrile101(M+Na)+ DMSO102(M+H)+ triethylamine (TEA)104/106(M+Cu)+ acetonitrile105(2M+Na)+ acetonitrile115(M+dimethyl formamide+H)+ acetonitrile120(M+Na+CH3CN)+ DMSO122(M+H)+tr
