Dihydroagarofuran type sesquiterpene compound and preparing method and application thereof

The invention discloses a dihydroagarofuran type sesquiterpene compound, the preparing method of the compound, and the application of the compound in preparing anti-microbial pesticides and relates to the field of medicinal chemistry. According to the application of the novel sesquiterpene compound in anti-microbial pesticides, the structure of the adopted sesquiterpene compound is shown in the figure of the abstract and is named 1beta-acetyl-6alpha-(5-carboxyl-N-methyl-2-pyridone)-8beta-nicotinoyl-9alpha-benzoyl-beta-dihydroagarofuran. The compound is characterized in that the stem leaves of the plant Monimopetalum Chinese Rehd. are used as raw materials, and then the compound is obtained through extraction and separation with the natural product chemistry method. As a pesticide, the compound has a remarkable resisting effect on pests including plutella xylostella, cabbage caterpillar, corn armyworm, prodenia litura, argyrogramma agnate, pea aphids, rice-stem borer, rice tryporyza incertulas and henosepilachna vigintioctomaculata. As a sterilant, the compound has a remarkable resisting effect on sclerotinia sclerotioru, rhizoctonia cereal, fusarium graminearum and botrytis cinerea person.