Table 2.

Chemical composition of different Rubus species, that is, R. moluccanus, R. fraxinifolius, and R. alpestris.

Sample	Number	Name of the compound	Concentration (%)	Retention time
R. moluccanus	1	2-Propenoic acid, 2-propenyl ester	6.002	3.693
	2	Pyruvate	2.998	3.969
	3	Furfural	3.185	5.272
	4	1,3-Butadiene-1-carboxylic acid	0.913	5.714
	5	Propenoic acid, 2-methyl-, methyl ester	2.857	6.403
	6	dl-Glyceraldehyde dimer	0.934	7.041
	7	2(1H)-Pyridinone, 6-hydroxy-	5.716	8.949
	8	2,4-Dihydroxy-2,5-dimethyl-3(2H)-furan-3-one	2.127	10.049
	9	Pentanoic acid, 4-oxo-	2.891	13.002
	10	2-Hydroxy-3-methyl-4- pyrone	7.549	14.370
	11	Isopropylmethylnitrosamine	0.922	17.391
	12	2,4-Dihydroxy-2,5-dimethyl-3(2H)-furan-3-one	10.345	17.604
	13	Hydroxy methyl furfural	21.642	21.970
	14	1,1,2-Triacetoxyethane	17.908	22.569
	18	Butanedioic acid, 2-hydroxy-2-methyl, (S)-	1.493	27.358
	20	Benzeneacetic acid, 4-hydroxy-, methyl ester	1.504	28.634
	21	Succinic acid, 3-methylbutyl pentyl ester	1.193	29.396
	23	β-D-Glucopyranoside, methyl	3.800	37.574
	24	Quinic acid	1.981	39.498
	25	β-Tocopherol	0.322	80.794
	26	γ-Sitosterol	0.204	87.214
R. fraxinifolius	3	2-Propenoic acid, 2-propenyl ester	3.589	3.685
	5	Furfural	2.503	5.261
	6	1,3-Butadiene-1-carboxylic acid	0.505	5.703
	9	2(1H)-Pyridinone, 6-hydroxy-	14.589	8.940
	16	2,4-Dihydroxy-2,5-dimethyl-3(2H)-furan-3-one	8.283	17.560
	22	1,1,2-Triacetoxyethane	10.370	22.514
	32	3-Deoxy-d-mannoic lactone	0.508	38.612
R. alpestris	3	Furfural	6.637	5.259
	6	2(1H)-Pyridinone, 6-hydroxy-	25.430	8.990
	9	2,4-Dihydroxy-2,5-dimethyl-3(2H)-furan-3-one	1.517	10.035
	11	Furaneol	3.325	12.979
	13	1H-Imidazole-4-carboxylic acid, methyl Ester	3.287	14.681
	18	2,4-Dihydroxy-2,5-dimethyl-3(2H)-furan-3-one	5.438	17.572
	21	5-Hydroxymethylfurfural	38.142	22.107
	27	Butane, 1,1′-1-[(Isopentyloxy)methoxy]-3-methylbutane	0.968	29.364
	28	Rhamnose	2.277	34.260
	31	5,5′-Oxy-dimethylene-bis(2-furaldehyde)	0.249	52.683
	35	β-Tocopherol	0.140	80.799
	36	Stigmast-5-en-3-ol	0.117	87.228