# US 2019/0166835 A1 · Fungal Trisaccharide Ester Compounds and Use Thereof in Preparing Agents for Preventing and Controlling Plant Fungal Diseases

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- Number: US 2019/0166835 A1
- Document ID: US20190166835A1
- Status: Published application
- Kind: A1
- Application number: 16/322,947
- Filed: 2017-09-18
- Published: 2019-06-06
- Earliest claimed: 2017-03-15
- Assignees: South China Botanical Garden, Chinese Academy of Sciences
- Applicants: South China Botanical Garden, Chinese Academy of Sciences
- Inventors: Liangxiong XU; Xuewu DUAN; Xiaoyi WEI; Jinghua XUE; Linyan FENG; Ping WU
- Web page: https://patentgrep.com/patent/US20190166835A1

## CPC

- A01N 43/16: with oxygen as the ring hetero atom
- A23B 2/779: Sugars; Derivatives thereof
- A23B 7/154: Organic compounds; Microorganisms; Enzymes
- C07H 13/04: having the esterifying carboxyl radicals attached to acyclic carbon atoms
- C07H 13/06: Fatty acids
- A23V 2002/00: Food compositions, function of food ingredients or processes for food or foodstuffs
- A01N: PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF (preservation of food or foodstuff A23); BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES (preparations for medical, dental or toiletry purposes which kill or prevent the growth or proliferation of unwanted organisms A61K); PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A23B: PRESERVATION OF FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES; CHEMICAL RIPENING OF FRUIT OR VEGETABLES
- C07H: SUGARS; DERIVATIVES THEREOF; NUCLEOSIDES; NUCLEOTIDES; NUCLEIC ACIDS (derivatives of aldonic or saccharic acids C07C, C07D; aldonic acids, saccharic acids C07C59/105, C07C59/285; cyanohydrins C07C255/16; glycals C07D; compounds of unknown constitution C07G; polysaccharides, derivatives thereof C08B; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification C12N15/00; sugar industry C13)
- A23V: INDEXING SCHEME RELATING TO FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES AND LACTIC OR PROPIONIC ACID BACTERIA USED IN FOODSTUFFS OR FOOD PREPARATION

## Abstract

Fungal trisaccharide ester compounds and agents containing the fungal trisaccharide ester compounds as active ingredients for preventing and controlling plant fungal diseases. A Pezicula sp. strain SC1337 was isolated from endophytes of a branch of bald cypress. The strain SC1337 is capable of producing five compounds exhibiting significant inhibitory activities against twelve common plant pathogenic fungi and preservative effect on fruits. Thus, the strain SC1337 can be used to prepare the five compounds exhibiting significant inhibitory activities against twelve common plant pathogenic fungi and preservative effect on fruits and used for preventing and controlling plant pathogenic fungi and fruit preservation.

## Claims

### Claim 1

(canceled)

### Claim 2

A method of preparing an agent for preventing and controlling plant fungal diseases, comprising: using a trisaccharide ester compound as an active ingredient to prepare the agent wherein the trisaccharide ester compound is represented by a formula selected from the group consisting of

### Claim 3

(canceled)

### Claim 4 (depends on 2)

The method according to claim 2, wherein the agent is for preventing and controlling Alternaria sp., Botryospuaeria sp., Botrytis sp., Colletotrichum sp., Curvularia sp., Fusarium sp., Geotrichum sp., Helminthosporium sp., Penicillium sp., Peronophythora sp., Rhizoctonia sp., or Ustilaginoidea sp.

### Claim 5

An agent for preventing and controlling plant fungal diseases, comprising a trisaccharide ester compound as an active ingredient; wherein the trisaccharide ester compound is represented by a formula selected from the group consisting of

### Claim 6 (depends on 5)

The agent for preventing and controlling the plant fungal diseases according to claim 5, wherein the agent is for preventing and controlling Alternaria sp., Botryospuaeria sp., Botrytis sp., Colletotrichum sp., Curvularia sp., Fusarium sp., Geotrichum sp., Helminthosporium sp., Penicillium sp., Peronophythora sp., Rhizoctonia sp., or Ustilaginoidea sp.

### Claim 7 (depends on 5)

The agent for preventing and controlling the plant fungal diseases according to claim 5, wherein the plant fungal diseases comprise early blight of tomatoes, ring rot of apples, grey mould of tomatoes, anthracnose of mangos, Curvularia lunata infection in bananas, fusarium wilt of bananas and watermelons, sour rot of citrus, southern corn leaf blight, blue mould of citrus, Peronophythora litchii infection in litchi, sheath blight of rice, and false smut of rice.

### Claim 8

(canceled)

### Claim 9

(canceled)