Antiparasitic agents
US4927918A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 11, 1989 |
| Grant date | May 22, 1990 |
| Priority date | — |
| Expiry date | Apr 11, 2009 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61P33/10
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.