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. Author manuscript; available in PMC: 2013 Aug 30.
Published in final edited form as: Rapid Commun Mass Spectrom. 2012 Aug 30;26(16):1767–1775. doi: 10.1002/rcm.6287

Figure 2.

Figure 2

Positive ion ESI ion trap mass spectra of the dimethyl ester of i-urobilin synthesized using methanolicHCl. A) Full scan; B) CID at 30% RF resonance ejection energy; C) CID at 70% RF resonance ejection energy.