By comparison of mass fragmentation pattern of each component with two modern MS libraries (NIST and Wiely 6), those were identified to one aliphatic alcohol (3-ethyl-2-methyl-1-pentene-3-ol) and three naphthoquinone derivatives (1,4-naphthoquinone, 5-hydroxy-1,4-naphthoquinone (juglone) and 5-hydro...
By comparison of mass fragmentation pattern of each component with two modern MS libraries (NIST and Wiely 6), those were identified to one aliphatic alcohol (3-ethyl-2-methyl-1-pentene-3-ol) and three naphthoquinone derivatives (1,4-naphthoquinone, 5-hydroxy-1,4-naphthoquinone (juglone) and 5-hydroxy-2-methyl-1,4-naphthoquinone (plumbagin)). According to the quantitative study with authentic compounds of three naphthoquinone derivatives, 1,4-naphthoquinone and 5-hydroxy-1,4-naphthoquinone were the major volatile components in the root shell of Juglans mandshurica and their amounts were ca. $54.4{\mu}g/g$ and $21.3{\mu}g/g$, respectively.
By comparison of mass fragmentation pattern of each component with two modern MS libraries (NIST and Wiely 6), those were identified to one aliphatic alcohol (3-ethyl-2-methyl-1-pentene-3-ol) and three naphthoquinone derivatives (1,4-naphthoquinone, 5-hydroxy-1,4-naphthoquinone (juglone) and 5-hydroxy-2-methyl-1,4-naphthoquinone (plumbagin)). According to the quantitative study with authentic compounds of three naphthoquinone derivatives, 1,4-naphthoquinone and 5-hydroxy-1,4-naphthoquinone were the major volatile components in the root shell of Juglans mandshurica and their amounts were ca. $54.4{\mu}g/g$ and $21.3{\mu}g/g$, respectively.
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