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a) CD-ECI spectrum of the Cu(II) complexed UP14R 5 measured in a single ToF LCT instrument (* denotes common background ions); b) Collision-induced dissociation spectrum of 5 measured in QTOF instrument; c) CD-ECI spectrum of 4FUP14R 6 measured in a single ToF LCT instrument without Cu(II) addition; d) CD-ECI spectrum of the Cu(II) complexed 4FUP14R 6 measured in a single ToF LCT instrument.
