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Visualization of the tentatively assigned metabolites in strawberry fruit. Optical images of (a) cross-section of strawberry fruit and (b) desorption ionization using through hole alumina membrane (DIUTHAME) chip blotted by the strawberry fruit. Ion images of m/z (c) 104.0, (d) 179.0, (e) 219.0, (f) 231.0, (g) 271.0, (h) 301.0, (i) 341.1, and (j) 381.1. Dotted white line indicates the analyzed region. Scale bar = 20 mm.
