Table 2.

SPME-GC/MS analyses of different parts of Robinia pseudoacacia flowers.

Peaks	Retention time	Name	Stamens and pistil	Petals	Nectar	Calix and nectaries
1	6.244	4-Methyl-1,3-pentadiene	1.21	1.54		1.32
2	8.956	2-Butanone	5.91	0.13		4.21
3	10.135	Ethanol
4	11.710	3-Pentanone	0.67			1.05
5	12.880	Butanoic acid-2-methyl-methyl ester	2.73	0.26
6	13.220	α-Pinene	1.33	0.89		20.73
7	16.033	Hexanal	1.36		1.68	1.07
8	16.236	1-Penten-3-ol	0.50		0.89
9	17.648	3-Butenoic acid-3-methyl-methyl ester		0.06
10	19.324	β-Pinene		0.35		8.56
11	19.429	β-Myrcene		1.11		9.42
12	19.876	2-Butenoic acid-3-methyl-methyl ester		0.42
13	20.827	Methyl tiglate		0.17
14	21.082	D-Limonene	7.52	0.22
15	22.516	E-Ocimene	0.79	1.20
16	23.089	1-Pentanol			1.53
17	23.271	Z-Ocimene	29.67	30.36		8.34
18	23.496	3-Octanone			3.77
19	24.230	(3E)-4,7-Dimethyl-3,6-octadienenitrile		0.09
20	25.311	Cyclopentene, 3-isopropenyl-5,5-dimethyl		0.37
21	25.540	Geranyl nitrile	17.16	4.25		14.71
22	26.078	(E)-2-Penten-1-ol			0.68
23	26.144	(Z)-3-Hexen-1-ol, acetate				0.75
24	26.988	5-Hepten-2-one-6-methyl			1.00
25	27.317	1-Hexanol	1.13		30.92	0.49
26	27.804	(E)-3-Hexen-1-ol			0.14
27	28.362	(4E-6Z)-allo-Ocimene	0.79	0.52	28.09	0.39
28	28.374	Benzene, methoxy			0.55
29	28.508	Butanoic acid-3-hydroxy-3-methyl-methyl ester		0.13
30	29.292	(4Z-6E)-allo-Ocimene		0.99	3.07	3.85
31	29.295	1,3-Cyclohexadiene-1,3,5,5-tetramethyl	0.71		2.29
32	31.080	1-Octen-3-ol		0.56	10.14	0.58
33	31.110	(E,E)-Cosmene			1.28
34	31.370	1,3,8-p-Menthatriene		0.17	2.60
35	32.212	trans-Linalool oxide (furan)		0.07	0.36
36	33.147	α-Copaene				1.43
37	34.745	Linalool	28.36	54.86	4.63	23.08
38	35.105	1-Octanol			2.07
39	37.062	Hotrienol		0.28
40	37.242	(E)-2-Octen-1-ol			0.16
41	38.693	1-Nonanol			3.31
42	47.343	2-Phenylethyl alcohol		0.30	0.57
43	55.082	Formamide-N-phenyl		0.64