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Single ion extracts (SIE) from C3 Mosher HPLC-ESIMS chromatograms of analytes prepared from (A) 1 [(i) m/z 333 [M–H]− (16a–b), (ii) m/z 347 [M–H]− (17a–b), (iii) m/z 437 [M + H]+ (18a–b)]; (B) 2 [(i) 333 [M–H]− (16a) and (ii) m/z 437 [M + H]+ (18a)]; (C) 3, [(i) m/z 347 [M–H]− (17a) and (ii) m/z 437 [M + H]+ (18a)]; and (D) 4 [(i) m/z 333 [M–H]− (16a) and (ii) m/z 347 [M–H]− (17a)].
