## 2 Results
### The Headspace Chemical Profile  
The headspace of _A.__ursinum_ honey (Table 1) dominated with monoterenes--linalod derivatives such as _cis_- and _trans_-linalod oxides (9.2%; 25.3%), hotrienol (12.7%), and linalool (5.8%).  
Few benzene derivatives, often found in different honey types [10], were detected by HS-SPME with minor abundance, e.g., benzaldehyde (1.1%), phenylacetaldehyde (1.7%), 2-phenylethanol (3.0%), 4-methoxybenzaldehyde (1.1%), and phenylacetonitrile (1.9%). 4-Ketoisophorone (2.8%) was the only  
\begin{table}
\begin{tabular}{c c c c c c c c c c} \hline \hline
**No.** & **Compound** & **R1** & **R1** & **R1** & **R1** & **R1** & **R1** & **R1** & **R1** & **R1** & **R1** \\ \hline
1 & Dimethyl disulfide & \textless{}000 & 747 & 1.2 & 14 & Hotienedi & 1106 & 1110 & 12.7 \\
2 & Butanoic acid & \textless{}000 & 763 & 0.7 & 15 & 2-Phenylethylhanol [4] & 1116 & 1116 & 3.0 \\
3 & 3-Methylbut2-eal * & \textless{}000 & 781 & 1.0 & 16 & Phenylacetonitrile & 1143 & 1141 & 1.9 \\
4 & Octane & \textless{}000 & 800 & 0.1 & 17 & 4-Ketoisophorone & 1147 & 1147 & 2.8 \\
5 & 3-Methylbutanoic acid & \textless{}000 & 888 & 1.7 & 18 & Octanoic acid [4] & 1176 & 1179 & 1.7 \\
6 & Benzaldehyde & 965 & 966 & 1.1 & 19 & Nonananan-1-cd [4] & 1178 & 1171 & 1.4 \\
7 & Hexanoic acid & 980 & 982 & 0.9 & 20 & _trans_-linalod oxide (pyram type) & 1183 & 1183 & 1.5 \\
8 & (_E_)-Hex-3 enoic acid & 991 & / & 0.7 & 21 & 4-Fepteptept [4] & 1194 & 1191 & 0.8 \\
9 & (_Z_)-Hex-3-enoic acid & 1013 & 1013 & 0.8 & 22 & 5-Hydroymethylfurural [4] & 1230 & 1226 & 4.0 \\
10 & phenylacetaldehyde & 1048 & 1049 & 1.7 & 23 & 4-Hydroxybenzaldehyde [4] & 1256 & 1258 & 1.1 \\
11 & _cis_-linaloid (_tetra_ type) & 1076 & 1075 & 2.5 & 24 & Nonanonic acid [4] & 1273 & 1276 & 4.0 \\
12 & _trans_-linaloid & 1091 & 1091 & 9.2 & 25 & 3,45-Timethylphenol [**13] & 1336 & - & 3.2 \\
13 & Linalool [4] & 1101 & 1101 & 5.8 & 26 & Hexadecanoic acid [4] & 1970 & 1977 & 1.7 \\ \hline \hline \end{tabular}  
* 1 RI–retention indices on HP-5 MS column relative to C9–C23 alkenes; 2 RI from the literature (National Institute of Standards and Technology (NIST) Chemistry WebBook, NIST Standard Reference Database Number 69, [[http://webbook.nist.gov/chemistry/](http://webbook.nist.gov/chemistry/)]([http://webbook.nist.gov/chemistry/](http://webbook.nist.gov/chemistry/))); 3 Area percentages (%), 4 identification confirmed with standard compound;
*—-tentatively identified; **—-**-correct isomer is not identified.  
\end{table}
Table 1: The Headspace volatiles of the sample determined by HS-SPME/GC-MS.  
norisoprenoid detected in the headspace in distinction from the extracts. Dimethyl disulfide (1.2%) was the only headspace compound that could be connected to the plant VOCs (it was found in _A. rursinum_ essential oil). The majority of the essential oil constituents, such as typical sulphides, disulfides, and trisulfides, were not present in the honey [3,4]. As was mentioned before, ripe ramson honey possesses a pleasant, particular aroma, and the probably typical sulfur volatile organic compounds were lost during the honey maturation in the hive. In addition, it is well known that honey VOCs usually significantly differ from the corresponding plant VOCs [11].