Antiparasitic agents

Organic compounds -- part of the class 532-570 series – Organic compounds – Carbohydrates or derivatives

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549268, C07H 1708

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active

049279181

ABSTRACT:
Antiparasitics comprising Avermectin derivatives of formula (I): ##STR1## wherein X represents a single or a double bond; R.sup.1 is H or OH; provided that when X is a single bond, R.sup.1 is H or OH, and when X is a double bond, R.sup.1 is absent;
R.sup.2 is an alkyl group substituted by one oxo or one or more hydroxy groups or by a single oxygen atom on two adjacent carbon atoms to form an oxirane ring, or R.sup.2 is an alkyl group substituted by an alkoxycarbonyl group, said substituents on R.sub.2 being attached to either or both a terminal carbon atom and a carbon atom adjacent to a terminal carbon atom of R.sup.2 ; and R.sup.3 is H or CH.sub.3 ; or, when R.sup.2 is oxo-substituted alkyl, an alkyl acetal or ketal derivative thereof.

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