## 2 Results and Discussion
### The Nectars' Chemical Composition of the Headspace, Volatiles and Semi-Volatiles
** & **Compound** & **RI** & **HoS** & **NE\({}_{\textbf{A}}\)** & **NE\({}_{\textbf{B}}\)** & **NEC\({}_{\textbf{C}}\)** & **NE\({}_{\textbf{D}}\)** & **HoS** & **NE\({}_{\textbf{A}}\)** & **NE\({}_{\textbf{B}}\)** & **NEC\({}_{\textbf{C}}\)** & **NE\({}_{\textbf{D}}\)** \\ \hline
1 & Acetic acid & \textless{}900 & 1.8 & 0.4 & 0.3 & - & - & 4.9 & - & - & - & 0.9 \\
2 & 3-Hydroxybutan-2-one & \textless{}900 & - & 0.2 & 0.3 & - & - & - & - & - & - & - \\
3 & Penna-1-ol & \textless{}900 & 1.3 & - & - & - & - & 1.3 & - & - & - & - \\
4 & Hexanal & \textless{}900 & - & 0.1 & 0.1 & 0.5 & 0.7 & - & - & - & 0.3 & - \\
5 & (Z)-Hex-ox-cn-1 & \textless{}900 & - & 2.9 & 1.7 & 0.2 & - & - & 0.3 & 0.1 & - & - \\
6 & Hexan-1-ol & \textless{}900 & - & 4.9 & 5.2 & - & - & - & 0.5 & 0.3 & - & - \\
7 & Heptan-2-one & \textless{}900 & 5.5 & 0.7 & - & - & - & - & 0.2 & - & - & - \\
8 & Heptan-2-ol & \textless{}900 & 7.8 & - & - & - & - & 3.3 & - & - & - & - \\
9 & \textless{}n-Pienne & 940 & - & 0.1 & 0.1 & - & - & - & 0.1 & 0.3 & - & - \\
10 & Benzaldehyde & 965 & 1.0 & 0.1 & 0.3 & 2.2 & 3.6 & 2.7 & - & - & 0.6 & - \\
11 & Hexanoic acid & 980 & - & - & - & - & - & 0.9 & - & 0.5 & - & - \\
12 & \textless{}9-Pienne & 982 & - & 0.1 & 0.1 & - & 0.4 & - & 0.5 & - & - & - \\
13 & 6-Methylhept-Sen-2-one & 989 & - & 0.6 & 0.8 & 0.2 & - & - & 0.5 & 0.3 & 0.6 & - \\
14 & Octari-2-one & 993 & - & 1.1 & 0.4 & - & - & - & 1.5 & - & - & - \\
15 & \textless{}9-Mycene & 994 & - & - & - & - & - & - & - & 0.4 & - & - \\
16 & 6-Methylhept-Sen-2-ol & 995 & - & - & 0.4 & - & - & - & - & 0.4 & - & - \\
17 & \textless{}4-Terpinene & 1022 & - & 0.1 & 0.1 & - & - & - & - & 0.4 & - & - \\
18 & p-Cyreme & 1029 & 4.0 & 3.0 & 2.1 & - & 1.1 & - & 3.6 & 3.7 & 0.3 & - \\
19 & Limonene & 1034 & - & 1.3 & 0.9 & - & - & - & 1.0 & 1.5 & - & - \\
20 & 18-Cineole & 1037 & 1.9 & 2.8 & 1.3 & 0.3 & 0.4 & 3.6 & 3.1 & 1.5 & 0.6 & - \\
21 & Benzyl alcohol & 1038 & 2.9 & - & - & - & - & - & 3.6 & - & - & - & - \\
22 & _cis_-\(\beta\)-Ocyreme & 1042 & - & - & - & - & - & - & 0.2 & 0.1 & - & - \\
23 & Phenyiacetaldehyde & 1048 & 0.5 & - & 0.7 & 5.5 & 5.6 & 2.0 & 0.3 & 3.2 & 7.0 \\
24 & _trans_-\(\beta\)-Ocyreme & 1052 & - & 0.7 & 0.8 & - & 0.7 & - & 2.4 & 4.1 & 0.0 & - \\
25 & Y-Terpinene & 1064 & 1.1 & 4.4 & 2.8 & - & 0.9 & - & 6.6 & 8.1 & 0.3 & - \\
26 & Octari-1-ol & 1074 & - & 1.1 & - & - & - & 0.5 & 0.5 & - & - \\
27 & \textless{}4-Terpinolence & 1092 & - & 0.4 & 0.1 & - & - & - & 0.3 & 1.1 & - & - \\
28 & Nonan-2-one & 1094 & - & 0.4 & - & - & - & - & 0.8 & - & - & - \\
29 & Methyl benzoate & 1098 & - & 0.4 & - & 0.2 & - & - & 0.3 & - & - \\
30 & Linalool & 1102 & 15.2 & 21.7 & 21.3 & 1.2 & 1.6 & 3.8 & 21.1 & 10.4 & 5.3 & 6.8 \\
31 & 2-Phenyiethanol & 1118 & 2.9 & 4.1 & 2.9 & 1.3 & 2.7 & 6.7 & 2.8 & 1.2 & 0.6 & 1.2 \\
32 & Methyl octanoate & 1128 & - & - & - & - & - & - & 0.2 & 0.4 & - & - \\
33 & Phenyiacetonitrile & 1143 & 11.0 & - & 1.9 & 7.2 & 7.3 & 10.4 & - & 1.2 & 5.0 & 6.3 \\
34 & Isopentolog & 1151 & - & - & 5.2 & - & - & - & - & 1.8 & - & - \\
35 & Isomentome & 1159 & - & - & 0.3 & - & - & - & - & 0.0 & - & - \\
36 & Nonan-1-ol & 1178 & - & 0.2 & - & - & - & - & 0.8 & - & - & - \\
37 & Terpinet-4-ol & 1181 & 4.1 & 5.9 & 5.8 & 0.3 & - & 2.0 & 3.6 & 1.5 & 0.9 & 0.7 \\
38 & p-Cyreme-8-ol & 1189 & - & - & - & - & - & - & 0.2 & - & - & - \\
39 & \(\alpha\)-Terpinetool & 1194 & 10.2 & 16.0 & 11.4 & 3.0 & 2.4 & 9.3 & 9.0 & 4.1 & 4.1 & 6.1 \\
40 & 2-Aminobenzaldehyde* & 1218 & - & - & 0.1 & 0.5 & 1.1 & - & 0.2 & 0.1 & 0.3 & - \\
41 & Methyl nonanoate & 1228 & - & -The major oxygenated monoterepenes in NE headspace were linalool (1.2%-21.7%; 5.3%-21.1%) and \(\alpha\)-terpineol (2.4%-16.0%; 4.1%-9.3%). Their highest percentages were found in NE _Kawano Wase_ and _Chahara_. Other abundant monoterepenes were terpinen-4-ol (0.0%-5.9%; 0.7%-3.6%), 1,8-cineole (0.4%-2.8%; 0.0%-3.7%) and \(\gamma\)-terpinene (0.0%-4.4%; 0.0%-8.1%). All these compounds are biosynthetically related and derive from geranyl pyrophosphate.