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. Author manuscript; available in PMC: 2016 Apr 5.
Published in final edited form as: J Am Soc Mass Spectrom. 2005 Aug;16(8):1377–1383. doi: 10.1016/j.jasms.2005.04.008

Figure 1.

Figure 1

APCI-MS spectrum of 1 and (n − Bu)4NNO3 (1:1) in CH2Cl2 showing signals for [1 + Cl]− at m/z = 880, [1 + NO3]− at m/z = 907, and the deprotonated receptor [1 − H] − at m/z = 844.