## 3 Results
### Free Volatile Components of Okinawan Pineapple
** & **RI** & **Compound** & **’N67-10’** & **’Yugafu’** & **’Yonekura’** \\ \hline
1 & 829 & Methyl acetate & 0.81 \(\pm\) 0.06 b & 0.07 \(\pm\) 0.01 c & 1.96 \(\pm\) 0.37 a \\
2 & 892 & Ethyl acetate & 1.82 \(\pm\) 0.12 b & 12.58 \(\pm\) 0.15 a & 2.40 \(\pm\) 0.44 b \\
3 & 909 & Methyl propanoate & 0.42 \(\pm\) 0.02 b & 0.53 \(\pm\) 0.01 b & 4.80 \(\pm\) 0.80 a \\
4 & 923 & Methyl 2-methylpropanoate & nd & 0.07 \(\pm\) 0.01 a & 0.60 \(\pm\) 0.14 b \\
5 & 963 & Ethyl propanoate & nd & 0.88 \(\pm\) 0.12 & nd \\
6 & 972 & Ethyl 2-methylpropanoate & nd & 0.22 \(\pm\) 0.05 & nd \\
7 & 983 & Methyl butanoate & 4.42 \(\pm\) 0.10 b & 1.46 \(\pm\) 0.14 b & 23.46 \(\pm\) 4.10 a \\
8 & 1012 & 2-Methylpropyl acetate & nd & 0.15 \(\pm\) 0.04 & 0.16 \(\pm\) 0.03 \\
9 & 1017 & Methyl 3-methylbutanoate & 0.29 \(\pm\) 0.02 b & 0.25 \(\pm\) 0.06 b & 3.27 \(\pm\) 0.64 a \\
10 & 1042 & Ethyl butanoate & 0.40 \(\pm\) 0.03 a & 0.27 \(\pm\) 0.03 b & 0.36 \(\pm\) 0.07 a \\
11 & 1051 & Ethyl 2-methylbutanoate & nd & 11.48 \(\pm\) 1.98 a & 0.28 \(\pm\) 0.05 b \\
12 & 1086 & Methyl pentaoate & 0.60 \(\pm\) 0.04 b & 0.17 \(\pm\) 0.04 b & 3.28 \(\pm\) 0.57 a \\
13 & 1120 & 2-Methylbutyl acetate & nd & 0.21 \(\pm\) 0.00 b & 2.70 \(\pm\) 0.43 a \\
14 & 1122 & 3-Methylbutyl acetate & nd & 0.53 \(\pm\) 0.28 & nd \\
15 & 1134 & Ethyl pentaoate & nd & 0.24 \(\pm\) 0.03 & nd \\
16 & 1187 & Methyl hexaonate & 18.84 \(\pm\) 1.57 b & 11.40 \(\pm\) 2.22 b & 263.91 \(\pm\) 48.16 a \\
17 & 1234 & Ethyl hexanoate & 0.15 \(\pm\) 0.00 b & 10.13 \(\pm\) 1.71 a & 1.50 \(\pm\) 0.29 b \\
18 & 1255 & 3-Methyl-1-2-butenyl acetate & 0.65 \(\pm\) 0.08 b & 1.24 \(\pm\) 0.49 b & 2.47 \(\pm\) 0.26 a \\
19 & 1259 & Methyl (Z)-3-hexenoate & 0.22 \(\pm\) 0.02 b & nd & 1.71 \(\pm\) 0.24 a \\
20 & 1265 & Methyl (E)-3-hexenoate & 0.46 \(\pm\) 0.03 b & nd & 2.49 \(\pm\) 0.47 a \\
21 & 1288 & Methyl heptanoate & 0.16 \(\pm\) 0.01 b & nd & 1.71 \(\pm\) 0.27 a \\
22 & 1290 & Methyl 2-hydroxy-2-methylbutanoate & nd & nd & 0.61 \(\pm\) 0.05 \\
23 & 1391 & Methyl octaoate & 0.84 \(\pm\) 0.16 b & 0.19 \(\pm\) 0.02 b & 10.28 \(\pm\) 2.74 a \\
24 & 1437 & Ethyl octanoate & 0.22 \(\pm\) 0.02 a & 0.27 \(\pm\) 0.11 & nd \\
25 & 1514 & Dimethyl propanoate!o & 0.80 \(\pm\) 0.07 b & nd & 1.98 \(\pm\) 0.31 a \\
26 & 1525 & Methyl 3-(methylthio)propanoate & 18.67 \(\pm\) 0.74 b & 2.20 \(\pm\) 0.13 b & 128.49 \(\pm\) 20.15 a \\
27 & 1530 & 2,3-Butanediy diacetate & 0.18 \(\pm\) 0.01 b & 0.13 \(\pm\) 0.02 b & 0.41 \(\pm\) 0.04 a \\
28 & 1569 & Ethyl 3-(methylthio)propanoate & 0.23 \(\pm\) 0.01 b & 9.45 \(\pm\) 0.96 a & 0.90 \(\pm\) 0.16 b \\
29 & 1730 & Benzyl acetate & 0.71 \(\pm\) 0.02 a & 0.48 \(\pm\) 0.04 b & 0.59 \(\pm\) 0.10 b \\  & Total esters & 50.89 & 64.60 & 460.32 \\
30 & 955 & Ethanol & nd & 1.31 \(\pm\) 0.13 & nd \\
31 & 1360 & 1-Hexanol & 0.47 \(\pm\) 0.02 a & 0.47 \(\pm\) 0.03 a & 0.33 \(\pm\) 0.04 b \\
32 & 1463 & 1-Heptanol & 0.22 \(\pm\) 0.02 & 0.23 \(\pm\) 0.04 & 0.31 \(\pm\) 0.10 \\
33 & 1496 & 2-Ethyl-1-hexanol & 0.95 \(\pm\) 0.04 a & 0.66 \(\pm\) 0.13 b & 1.14 \(\pm\) 0.03 a \\
34 & 1565 & 1-Octanol & 0.27 \(\pm\) 0.01 b & 0.33 \(\pm\) 0.04 b & 0.89 \(\pm\) 0.10 a \\
35 & 1646 & Menthol & 0.49 \(\pm\) 0.01 a & 0.20 \(\pm\) 0.04 c & 0.31 \(\pm\) 0.01 b \\
36 & 1662 & 2-Furamethanol & 1.17 \(\pm\) 0.21 b & 0.99 \(\pm\) 0.11 b & 2.10 \(\pm\) 0.46 a \\  & Total alcohols & 3.57 & 4.19 & 5.08 \\
37 & 1207 & Eucalyptus & 0.38 \(\pm\) 0.03 b & 0.67 \(\pm\) 0.15 a & 0.29 \(\pm\) 0.03 b \\
38 & 1232 & (E)-P-O-Cimenne & nd & nd & 1.99 \(\pm\) 1.79 \\
39 & 1488 & \(\alpha\)-Copaeene & 0.75 \(\pm\) 0.11 b & 0.18 \(\pm\) 0.00 b & 1.50 \(\pm\) 0.32 a \\
40 & 1588 & \(\beta\)-Elemene & 0.54 \(\pm\) 0.13 & nd & nd \\
41 & 1606 & Terpinen-4-ol & 0.26 \(\pm\) 0.02 b & 0.28 \(\pm\) 0.04 b & 0.83 \(\pm\) 0.16 a \\
42 & 1686 & \(\gamma\)-Munroulene & 0.28 \(\pm\) 0.10 & nd & nd \\
43 & 1722 & \(\alpha\)-Munroulene & 0.47 \(\pm\) 0.10 ab & 0.20 \(\pm\) 0.03 b & 0.81 \(\pm\) 0.21 a \\
44 & 1756 & \(\delta\)-Cadniene & nd & nd & 0.34 \(\pm\) 0.08 \\  & Total terpen & 2.68 & 1.33 & 5.76 \\
45 & 1338 & Methyl heptone & nd & 0.27 \(\pm\) 0.01 \\
46 & 1596 & 4-Metchoxy-2,5-dimethyl-3(2H)-furanone & 0.46 \(\The major ester compounds in both 'N67-10' and 'Yonekura' were methyl hexanoate and methyl 3-(methylthio)propanoate, but their amounts were much greater in 'Yonekura' (263.91 and 128.49 \(\mathrm{\SIUnitSymbolMicro g}\)/100 mL, respectively) (Table 2).