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. 2009 Jun;85(6):204–215. doi: 10.2183/pjab.85.204

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© 2009 The Japan Academy

This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Fig. 2 — a. ERMS spectrum of 2α (m/z 365) at the MS⁴ stage. b. ERMS spectrum of the unfragmented precursor (m/z 365) isolated during CID of 2α at the MS⁵ stage. The d value and r² between spectra 2a and 2b were 0.867 and 0.997, respectively. For d value, see experimental section. c. ERMS spectrum of 2β (m/z 365) at the MS⁴ stage. d. ERMS spectrum of the unfragmented precursor (m/z 365) isolated during CID of 2βat the MS⁵ stage. The d value and r² between spectra 2c and 2d were 0.966 and 0.997, respectively. For d value, see experimental section.