The fruit fly, Bactrocera dorsalis (Diptera: Tephritidae) is one of the most important pests in all mango-producing areas, particularly in West Africa. In Senegal, O. americanum leaves have been used for several years...The fruit fly, Bactrocera dorsalis (Diptera: Tephritidae) is one of the most important pests in all mango-producing areas, particularly in West Africa. In Senegal, O. americanum leaves have been used for several years to control this fly. However, to our knowledge, no chemical studies have been carried out. Thus, the aim of this study is to determine the chemical composition of the essential oil of O. americanum leaves collected in Senegal and Gambia. The essential oil obtained by hydrodistillation of these leaves is analyzed by GC/FID and GC/MS. Yields of essential oils from O. americanum leaves are 3.84% and 2.13%, respectively. Analysis of these essential oils by GC/FID and GC/MS allowed the identification of 23 compounds representing almost 100% of the total compositions. These essential oils are mainly dominated by methyleugenol (72.0% and 75.8%, respectively). Other components in significant percent are trans-β-caryophyllene (13.9% and 13.0%, respectively), germacrene D (4.1% and 3.7%, respectively), β-elemene (3.3% and 0.9%, respectively). Due to the high methyleugenol content, this study explains the attractive potential of O. americanum towards B. dorsalis. In perspective, we plan to evaluate the attractive effect of the essential oil and leaf powder of O. americanum against B. dorsalis, a real pest of mango orchards in Senegal.展开更多
Methyleugenol （1）, one of the main bioactive constituents of the seeds of Myristicafragrans Houtt. （family： Myristicaceae）, was incubated with rat hepatic microsomes from rats pretreated with sodium phenobarbital...Methyleugenol （1）, one of the main bioactive constituents of the seeds of Myristicafragrans Houtt. （family： Myristicaceae）, was incubated with rat hepatic microsomes from rats pretreated with sodium phenobarbital. Eight biotransformation products named （R）-l＇-methoxymethyleugenol （2）, 3-（3,4-dimethoxyphenyl）-l-methoxyprop-2-ene （3）, cis-3,4-dimethoxycinnamyl acetate （4）, trans-3,4-dimethoxycinnamyl acetate （5）, （R）-I hydroxymethyleugenol （6）, trans-3,4-dimethoxycinnamyl alcohol （7）, cis-3,4-dimethoxycinnamyl alcohol （8）, and （R）-3-（3,4-dimethoxyphenyl）-propane-l,2-diol （9） were obtained and their structures were elucidated by NMR and MS data analysis and by comparison with the previously reported data. The biotransformation of 1 may provide valuable information for the use of methyleugenol. The NMR data of compounds 4 and 6 were reported for the first time.展开更多
文摘The fruit fly, Bactrocera dorsalis (Diptera: Tephritidae) is one of the most important pests in all mango-producing areas, particularly in West Africa. In Senegal, O. americanum leaves have been used for several years to control this fly. However, to our knowledge, no chemical studies have been carried out. Thus, the aim of this study is to determine the chemical composition of the essential oil of O. americanum leaves collected in Senegal and Gambia. The essential oil obtained by hydrodistillation of these leaves is analyzed by GC/FID and GC/MS. Yields of essential oils from O. americanum leaves are 3.84% and 2.13%, respectively. Analysis of these essential oils by GC/FID and GC/MS allowed the identification of 23 compounds representing almost 100% of the total compositions. These essential oils are mainly dominated by methyleugenol (72.0% and 75.8%, respectively). Other components in significant percent are trans-β-caryophyllene (13.9% and 13.0%, respectively), germacrene D (4.1% and 3.7%, respectively), β-elemene (3.3% and 0.9%, respectively). Due to the high methyleugenol content, this study explains the attractive potential of O. americanum towards B. dorsalis. In perspective, we plan to evaluate the attractive effect of the essential oil and leaf powder of O. americanum against B. dorsalis, a real pest of mango orchards in Senegal.
基金National Natural Science Foundation of China(Grant No.3097386381161120429)National Key Technology R&D Program of China(Grant No.2011BAI07B08)
文摘Methyleugenol （1）, one of the main bioactive constituents of the seeds of Myristicafragrans Houtt. （family： Myristicaceae）, was incubated with rat hepatic microsomes from rats pretreated with sodium phenobarbital. Eight biotransformation products named （R）-l＇-methoxymethyleugenol （2）, 3-（3,4-dimethoxyphenyl）-l-methoxyprop-2-ene （3）, cis-3,4-dimethoxycinnamyl acetate （4）, trans-3,4-dimethoxycinnamyl acetate （5）, （R）-I hydroxymethyleugenol （6）, trans-3,4-dimethoxycinnamyl alcohol （7）, cis-3,4-dimethoxycinnamyl alcohol （8）, and （R）-3-（3,4-dimethoxyphenyl）-propane-l,2-diol （9） were obtained and their structures were elucidated by NMR and MS data analysis and by comparison with the previously reported data. The biotransformation of 1 may provide valuable information for the use of methyleugenol. The NMR data of compounds 4 and 6 were reported for the first time.
