Figure 3.
Mass spectra of a) (E)-2-(pent-3-en-1-yl)pyridine (streptopyridine E, 8), b) (1Z,3E)-penta-1,3-dien-1-yl)pyridine (streptopyridine A, 9), c) 2-((1E,3E)-penta-1,3-dien-1-yl)pyridine (streptopyridine B, 12).
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