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HPLC profile of buckwheat honey samples. Note. (1) protocatechuic acid, (2) 4-hydroxy benzoic acid, (3) 4-hydroxybenzaldehyde, (4) vanillin, (5) gallic acid, (6) p-coumaric acid, (7) benzoic acid, (8) ferulic acid, (9) isoferulic acid, (10) methyl syringate, (11) trans,trans-abscisic acid,(12) cis,trans-abscisic acid. (a) Sample 1, (b) sample 2, (c) sample 3, (d) sample 4, (e) sample 5, (f) sample 6, (g) sample 7, (h) sample 8.
