Table 4.

List of the organoleptic active compounds isolated from maple syrup extracts.

Comp	Name	MS-BuOH	MS-EtOAc	MS-MeOH	Chloroform	Dichloromethane	Ref
Taste compounds
1	5′‐Inosine monophosphate						[89]
Odor compounds
2	Enolic viscous				+		[90]
3	Vanillin				+		[91]
4	Syringaldehyde				+		[91]
Flavor compounds
5	Vanillin				+		[92]
6	Syringaldehyde				+		[92]
7	Dihydroconiferyl alcohol				+		[92]
8	Acetol				+		[93]
9	Acetoin				+		[93]
10	Ethyl vanillate				+		[93]
11	Syringoyl methyl ketone				+		[93]
12	Methylcyclopentenolone				+		[93]
13	Acetovanillone				+		[93]
14	Guaiacyl acetone				+		[27]
15	Vanilloyl methyl ketone				+		[27]
16	Furfural				+		[27]
17	Hydroxymethylfurfural				+		[27]
18	Lactic acid				+		[27]
19	Levulinic acid				+		[27]
20	C5 to C9 Aliphatic acids				+		[27]
21	Oxalic acids				+		[27]
22	Fumaric acids				+		[27]
23	Malic acids				+		[27]
24	2-Ethyl-l-hexanol				+		[28]
25	2-Hydroxymethylcyclopenten-2-en-ol				+		[28]
26	2-Furanmethanol				+		[28]
27	Three organic acids (2-ethyl-l-hexanoic acid				+		[28]
28	n-Hexanoic acid				+		[28]
29	n-Nonanoic acid				+		[28]
30	2-Hydroxy-3-methyl-2-cyclopenten-l-one				+		[28]
31	2-Methyl-2-cyclopenten- 1-one				+		[28]
32	2-Methyl-2,5-cyclohexadien-l,4-dione				+		[28]
33	2,3-Dihydro-3,5-dihydroxy-6-methyl(4H)-pyran-4-one				+		[28]
34	2,5-Dimethyl-4-hydroxy-3(2H)-furanone				+		[28]
35	3-Methyl-3-buten-2-one				+		[28]
36	3-Methyl-2,5-furandione				+		[28]
37	Methylpyrazine					+	[28]
38	2,3-Dimethylpyrazine					+	[94,95]
39	2,5-Dimethylpyrazine					+	[94,95]
40	2,6-Dimethylpyrazine					+	[94,95]
41	Ethylpyrazine					+	[94]
42	2-Ethyl-6-methylpyrazine					+	[94]
43	Trimethylpyrazine					+	[94]
44	2-Methylpyrazine						[94]
45	2-Ethylpyrazine						[94]
46	2-Ethyl-5-methylpyrazine						[95]
47	2-Ethyl-3-methylpyrazine						[95]
48	2-Methoxy-3-(1-methylethyl)pyrazine						[95]
49	2-Ethyl-3,5-dimethylpyrazine						[95]
50	2,3-Diethylpyrazine						[95]
51	Tetramethylpyrazine						[95]
52	2,3-Diethyl-5-methylpyrazine						[95]
53	2-Ethenyl-5-methylpyrazine						[95]
54	2-Ethenyl-5-methylpyrazine						[95]
55	2-Acetyl-3-ethylpyrazine						[95]