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Fingerprints of the compounds isolated from AEOs from different regions using GC-IMS: A (Wenshan), B (Nujiang), C (Tengchong). (A) represents the fingerprint of all compounds detected by GC-IMS. (B) shows the enlarged fingerprint of compounds with obvious content differences among regions. Red represents high concentration, and dark blue represents almost not present. Increasing color darkness from dark blue to red depicts increasing concentration.
