Table 3. Concentration (μg/mL) of volatile compounds of Korean, Russian and New Zealand velvet antler extracts

Compound	Retention time	Korean velvet antler	Russian velvet antler	New zealand velvet antler	Identification1)
Esters
Methyl acetate	1.80	0.002±0.001	ND	ND	MS+STD
Ethyl acetate	2.25	0.04±0.005	0.06±0.00	0.05±0.00	MS+STD
Methyl propionate	2.40	0.01±0.003	ND	ND	MS+STD
Ethyl butanoate	3.75	0.002±0.001	ND	ND	MS
1-Methoxy-2-propyl acetate	8.24	0.011±0.000a	0.008±0.00b	0.006±0.00b	MS
Methyl hexanoate	9.88	0.002±0.001	ND	ND	MS
2-Isobutoxyethyl propionate	12.37	0.001±0.000	ND	ND	MS
Chrysanthenyl propionate	12.52	0.002±0.000	ND	ND	MS
Isobutyl pentyl carbonate	13.53	0.001±0.000	ND	ND	MS
Methyl octanoate	14.57	0.004±0.000	ND	ND	MS+STD
Ethyl octanoate	16.08	0.007±0.001a	0.002±0.00b	0.002±0.00b	MS+STD
Heptyl heptanoate	22.02	0.001±0.000	0.003±0.00	0.003±0.00	MS
Alcohols
2-Furanmethanol	7.85	0.001±0.000	0.007±0.00	ND	MS+STD
Eucalyptol	12.60	0.003±0.000	ND	ND	MS
2,4-Di-tert-butylphenol	21.35	0.002±0.000	0.001±0.00	0.001±0.00	MS
Aldehydes
3-Methyl-butanal	2.70	ND	0.001±0.00	0.001±0.00	MS+STD
Ketones
2-Heptanone	8.89	0.002±0.000	ND	ND	MS+STD
2,4-Dimethyl-3-hexanone	10.72	0.15±0.011a	0.08±0.01b	0.083±0.001b	MS
2,5-Dimethyl-3-hexanone	10.99	0.014±0.001	ND	0.11±0.01	MS
3-Octanone	11.02	0.023±0.000	0.03±0.00	0.03±0.003	MS+STD
2,4-Dimethyl-3-hexanone	11.10	0.037±0.000	0.001±0.00	0.02±0.001	MS
2-Undecanone	17.80	0.016±0.000	0.015±0.00	0.02±0.001	MS
Hydrocarbons
2,2,6-Trimethyl-octane	11.55	0.008±0.00	0.004±0.00	0.006±0.00	MS
Decane	11.83	0.007±0.00	0.002±0.00	ND	MS
2-Methyl-undecane	12.92	0.002±0.00	ND	ND	MS
3,7-Dimethyl-nonane	13.03	0.004±0.00	ND	ND	MS
3,6-Dimethyl-undecane	13.29	0.005±0.00	0.001±0.00	ND	MS
2,5-Dimethyl-dodecane	13.59	0.003±0.00	ND	ND	MS
1-(Hexyloxy)-5-methyl-hexane	13.79	0.002±0.00	ND	ND	MS
Hexyloxyoctane	14.08	0.002±0.00	ND	ND	MS
Tridecane	17.93	0.002±0.00	ND	ND	MS
Tetradecane	19.65	0.001±0.00	ND	ND	MS

Identification: The compounds were identified by either mass spectra (MS) from library or authentic standards (STD).
Means within a same row with different superscripts differ significantly at (p<0.05).
ND, not detectable.