Minor Constituents of Japanese Ho-Leaf Oil

Abstract

The main component of Japanese Ho-leaf oil has been shown to be (‒)-linalool (80~90%), and the following twenty minor constituents newly have been identified; methyl vinyl ketone, methyl isobutyl ketone, mesityl oxide, β-pinene, myrcene, (+)-limonene, cis- and trans-ocimene, n-hexanol, cis-3-hexenol, cis- and trans-linalool oxide, (‒)-1-terpinen-4-ol, (+)-cis and (+)-trans-2,6,6-trimethyl-2-vinyl-5-hydroxytetrahydropyran, citronellol, nerol, (+)-β-selinene, (+)-tagetonol and (‒)-trans-hotrienol. (+)-Tagetonol and (‒)-trans-hotrienol have been demonstrated to be (+)-3,7-dimethyl-3-hydroxy-1-octen-5-one (III) and (3R)-(‒)-trans-3,7-dimethyl-3-hydroxy-1,5,7-octatriene (IX), respectively.