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| The '''milbemycins''' are a group of ]s chemically related to the ]s and were first isolated in 1972 from '']''. | The '''milbemycins''' are a group of ]s chemically related to the ]s and were first isolated in 1972 from '']''. | ||
| They are used in veterinary medicine as ] agents against worms, ticks and fleas.<ref name="ECSOC2"> {{webarchive|url=https://web.archive.org/web/20080418065116/http://ecsoc2.hcc.ru/ecsoc-2/dl001/insecticides.html |date=2008-04-18 }}</ref> | They are used in veterinary medicine as ] agents against worms, ticks and fleas.<ref name="ECSOC2"> {{webarchive|url=https://web.archive.org/web/20080418065116/http://ecsoc2.hcc.ru/ecsoc-2/dl001/insecticides.html |date=2008-04-18 }}</ref> | ||
Revision as of 00:50, 29 January 2023
Class of chemical compoundsThe milbemycins are a group of macrolides chemically related to the avermectins and were first isolated in 1972 from Streptomyces hygroscopicus. They are used in veterinary medicine as antiparasitic agents against worms, ticks and fleas.
Mechanism of action
Like avermectins, milbemycins are products of fermentation by Streptomyces species. They have a similar mechanism of action, but a longer half-life than the avermectins. They open glutamate-sensitive chloride channels in neurons and myocytes of invertebrates, leading to hyperpolarisation of these cells and blocking of signal transfer.
Examples
| Name | =R | =R | –R |
|---|---|---|---|
| Milbemectin | –H, (β)–OH | –H, –H | –CH3 : –CH2CH3 = 3:7 |
| Milbemycin oxime | =NOH | –H, –H | –CH3 : –CH2CH3 = 3:7 |
| Moxidectin | –H, (β)–OH | =NOCH3 | (Z)–C(CH3)=CH–CH(CH3)2 |
| Nemadectin | –H, (β)–OH | –H, (α)–OH | (Z)–C(CH3)=CH–CH(CH3)2 |
References
- ^ The 2nd International Electronic Conference on Synthetic Organic Chemistry: Insecticides Archived 2008-04-18 at the Wayback Machine
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